diff --git a/ci_scripts/check_api_label_cn.py b/ci_scripts/check_api_label_cn.py
index 6d8e0b71fde..6496f60bf34 100644
--- a/ci_scripts/check_api_label_cn.py
+++ b/ci_scripts/check_api_label_cn.py
@@ -1,10 +1,17 @@
+from __future__ import annotations
+
 import argparse
 import logging
-import os
 import re
 import sys
 from pathlib import Path
 
+# precompile regex patterns
+CN_API_LABEL_PATTERN = re.compile(r".. _([a-zA-Z0-9_]+):")
+REF_PATTERN = re.compile(r":ref:`([^`]+)`")
+API_LABEL_EXTRACT_PATTERN = re.compile(r".+?<(?P<api_label>.+?)>")
+CN_API_PREFIX = "cn_api_paddle"
+
 logger = logging.getLogger()
 if logger.handlers:
     # we assume the first handler is the one we want to configure
@@ -20,87 +27,141 @@
 logger.setLevel(logging.INFO)
 
 
-# check file's api_label
-def check_api_label(rootdir, file):
-    real_file = Path(rootdir) / file
-    with open(real_file, "r", encoding="utf-8") as f:
+def check_api_label(file_path: Path, doc_root: Path) -> str | None:
+    """Check if the first line of the file matches the expected api_label format."""
+    with open(file_path, "r", encoding="utf-8") as f:
         first_line = f.readline().strip()
-    return first_line == generate_en_label_by_path(file)
-
-
-# path -> api_label (the first line's style)
-def generate_en_label_by_path(file):
-    result = file.removesuffix("_cn.rst")
-    result = "_".join(Path(result).parts)
-    result = f".. _cn_{result}:"
-    return result
-
-
-# traverse doc/api to append api_label in list
-def find_all_api_labels_in_dir(rootdir):
-    all_api_labels = []
-    for root, dirs, files in os.walk(rootdir + API):
-        for file in files:
-            real_path = Path(root) / file
-            path = str(real_path).removeprefix(rootdir)
-            if not should_test(path):
-                continue
-            for label in find_api_labels_in_one_file(real_path):
-                all_api_labels.append(label)
-    return all_api_labels
+    except_line = generate_cn_label(file_path, doc_root)
+    if first_line == except_line:
+        return None
+    return f"`{file_path}` first line is: `{first_line}`, but expected generated by path: `{except_line}`."
+
+
+def generate_cn_label(file_path: Path, doc_root: Path) -> str:
+    """Generate the expected api_label format from file path."""
+    relative_path = file_path.relative_to(doc_root)
+    stem = relative_path.stem.removesuffix("_cn")
+    parts = relative_path.with_name(stem).parts
+    label = "_".join(parts)
+    return f".. _cn_{label}:"
+
+
+def collect_api_labels(api_root: Path) -> set[str]:
+    """Collect all valid api labels."""
+    labels = set()
+    for rst_file in api_root.rglob("*.rst"):
+        if not rst_file.is_file():
+            continue
+        if not need_check(rst_file, api_root):
+            continue
+        labels.update(extract_api_labels(rst_file))
+    return labels
 
 
-# api_labels in a file
-def find_api_labels_in_one_file(file_path):
-    api_labels_in_one_file = []
+def extract_api_labels(file_path: Path) -> set[str]:
+    labels = set()
     with open(file_path, "r", encoding="utf-8") as f:
         lines = f.readlines()
         for line in lines:
-            line = re.search(".. _([a-zA-Z0-9_]+)", line)
-            if not line:
+            match = CN_API_LABEL_PATTERN.search(line)
+            if not match:
                 continue
-            api_labels_in_one_file.append(line.group(1))
-    return api_labels_in_one_file
+            label = match.group(1)
+            if not label.startswith("cn_api_paddle"):
+                continue
+            labels.add(label)
+    return labels
 
 
 # api doc for checking
-def should_test(file):
+def need_check(file_path: Path, api_root: Path) -> bool:
     return (
-        file.endswith("_cn.rst")
-        and not Path(file).name == "Overview_cn.rst"
-        and not Path(file).name == "index_cn.rst"
-        and file.startswith(API)
+        file_path.name.endswith("_cn.rst")
+        and file_path.name not in {"Overview_cn.rst", "index_cn.rst"}
+        and file_path.is_relative_to(api_root)
     )
 
 
-def run_cn_api_label_checking(rootdir, files):
-    for file in files:
-        if should_test(file) and not check_api_label(rootdir, file):
-            logger.error(
-                f"The first line in {rootdir}/{file} is not avaiable, please re-check it!"
-            )
-            sys.exit(1)
-    valid_api_labels = find_all_api_labels_in_dir(rootdir)
+def validate_api_label_references(
+    files: list[Path], valid_api_labels: set[str]
+) -> list[str]:
+    errors = []
     for file in files:
-        if not file.endswith(".rst"):
-            continue
-        with open(Path(rootdir) / file, "r", encoding="utf-8") as f:
-            pattern = f.read()
-        matches = re.findall(r":ref:`([^`]+)`", pattern)
+        with open(file, "r", encoding="utf-8") as f:
+            content = f.read()
+        matches = REF_PATTERN.findall(content)
         for match in matches:
             api_label = match
-            if api_label_match := re.match(
-                r".+<(?P<api_label>.+?)>", api_label
-            ):
+            if api_label_match := API_LABEL_EXTRACT_PATTERN.match(api_label):
                 api_label = api_label_match.group("api_label")
-            if (
-                api_label.startswith("cn_api_paddle")
-                and api_label not in valid_api_labels
-            ):
-                logger.error(
-                    f"Found api label {api_label} in {rootdir}/{file}, but it is not a valid api label, please re-check it!"
-                )
-                sys.exit(1)
+            if not api_label.startswith(CN_API_PREFIX):
+                continue
+            if api_label in valid_api_labels:
+                continue
+            errors.append(f"api label `{api_label}` in `{file}`")
+    return errors
+
+
+def get_custom_files_for_checking_usage(api_root: Path) -> set[Path]:
+    # TODO: add more dir for checking
+    custom_files = set()
+    for rst_file in api_root.rglob("*.rst"):
+        if not rst_file.is_file():
+            continue
+        if rst_file.name in {"set_global_initializer_cn.rst"}:
+            # TODO: how to deal with `api_paddle_Tensor_create_tensor`?
+            continue
+        custom_files.add(rst_file)
+    return custom_files
+
+
+def run_cn_api_label_checking(
+    doc_root: Path, api_root: Path, files: list[Path]
+) -> None:
+    # get real path for changed files
+    real_path_files_set = set(files)
+
+    errors = []
+    # check the api_label in the first line for increased files
+    for file_path in real_path_files_set:
+        if not need_check(file_path, api_root):
+            continue
+        if error := check_api_label(file_path, doc_root):
+            errors.append(error)
+    if errors:
+        logger.error(
+            "Found first line is not available as follows, please re-check it!"
+        )
+        for i, error in enumerate(errors, 1):
+            logger.error(f"{i}: {error}")
+        sys.exit(1)
+
+    # collect all api_labels in api_root
+    valid_api_labels = collect_api_labels(api_root)
+
+    # check the usage of api_label in custom files
+    need_uasge_check_files = set()
+    for file_path in real_path_files_set:
+        if not file_path.is_relative_to(doc_root):
+            continue
+        if file_path.suffix != ".rst":
+            continue
+        need_uasge_check_files.add(file_path)
+
+    api_label_usage_file_set = (
+        need_uasge_check_files | get_custom_files_for_checking_usage(doc_root)
+    )
+
+    if errors := validate_api_label_references(
+        api_label_usage_file_set, valid_api_labels
+    ):
+        logger.error(
+            "Found valid api labels usage as follows, please re-check it!"
+        )
+        for i, error in enumerate(errors, 1):
+            logger.error(f"{i}: {error}")
+        sys.exit(1)
+
     print("All api_label check success in PR !")
 
 
@@ -110,29 +171,27 @@ def parse_args():
     """
     parser = argparse.ArgumentParser(description="cn api_label checking")
     parser.add_argument(
-        "rootdir",
+        "doc_root",
+        type=Path,
         help="the dir DOCROOT",
-        type=str,
-        default="/FluidDoc/docs/",
+        default=Path("/FluidDoc/docs"),
     )
 
     parser.add_argument(
-        "apiroot",
-        type=str,
-        help="the dir APIROOT",
-        default="/FluidDoc/docs/api/",
+        "api_root",
+        type=Path,
+        help="the dir api_root",
+        default=Path("/FluidDoc/docs/api"),
     )
     parser.add_argument(
         "all_git_files",
-        type=str,
+        type=Path,
         nargs="*",
         help="files need to check",
     )
-    args = parser.parse_args()
-    return args
+    return parser.parse_args()
 
 
 if __name__ == "__main__":
     args = parse_args()
-    API = args.apiroot.removeprefix(args.rootdir + "/")
-    run_cn_api_label_checking(args.rootdir, args.all_git_files)
+    run_cn_api_label_checking(args.doc_root, args.api_root, args.all_git_files)
diff --git a/ci_scripts/check_api_label_cn.sh b/ci_scripts/check_api_label_cn.sh
index 33d206420f8..c20d2626e18 100644
--- a/ci_scripts/check_api_label_cn.sh
+++ b/ci_scripts/check_api_label_cn.sh
@@ -3,8 +3,8 @@ set -x
 
 FLUIDDOCDIR=${FLUIDDOCDIR:=/FluidDoc}
 
-DOCROOT=${FLUIDDOCDIR}/docs/
-APIROOT=${DOCROOT}/api/
+DOCROOT=${FLUIDDOCDIR}/docs
+APIROOT=${DOCROOT}/api
 
 SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
 source ${SCRIPT_DIR}/utils.sh
@@ -13,7 +13,10 @@ if [ -z ${BRANCH} ]; then
     BRANCH="develop"
 fi
 
-all_git_files=`git diff --name-only --diff-filter=ACMR upstream/${BRANCH} | sed 's#docs/##g'`
+all_git_files=$(git diff --name-only --diff-filter=ACMR upstream/${BRANCH})
+
+real_path_git_files=$(echo ${all_git_files} | sed "s|^|${FLUIDDOCDIR}/|g")
+
 echo $all_git_files
 echo "Run API_LABEL Checking"
-python check_api_label_cn.py ${DOCROOT} ${APIROOT} $all_git_files
+python check_api_label_cn.py ${DOCROOT} ${APIROOT} $real_path_git_files