diff --git a/modules/dataprocess/dataclean.py b/modules/dataprocess/dataclean.py
new file mode 100644
index 0000000..fa77343
--- /dev/null
+++ b/modules/dataprocess/dataclean.py
@@ -0,0 +1,190 @@
+import argparse
+import json
+import os
+import sys
+from functools import lru_cache
+from pathlib import Path
+
+from tqdm import tqdm
+
+# 允许从仓库根目录直接运行脚本（无需安装为包）。
+PROJECT_ROOT = Path(__file__).resolve().parents[2]
+if str(PROJECT_ROOT) not in sys.path:
+    sys.path.insert(0, str(PROJECT_ROOT))
+
+from config import settings
+
+
+@lru_cache(maxsize=1)
+def _load_clean_prompt() -> str:
+    candidate_paths = [
+        Path(__file__).resolve().parent.parent / "prompts" / "Data_clean_prompt.txt",
+        PROJECT_ROOT / "prompts" / "Data_clean_prompt.txt",
+    ]
+    for prompt_path in candidate_paths:
+        if prompt_path.exists():
+            with open(prompt_path, "r", encoding="utf-8") as f:
+                return f.read().strip()
+    raise FileNotFoundError(
+        "未找到 Data_clean_prompt.txt，请确认存在于 modules/prompts/ 或 prompts/ 目录。"
+    )
+
+
+@lru_cache(maxsize=1)
+def _get_cleaner_client():
+    try:
+        from openai import OpenAI
+    except ImportError as exc:
+        raise ImportError("缺少依赖 openai，请先安装：pip install openai") from exc
+    return OpenAI(api_key=settings.llm_api_key, base_url=settings.llm_api_base or None)
+
+
+def _get_cleaner_model_name() -> str:
+    env_model = os.getenv("DATACLEAN_MODEL_NAME", "").strip()
+    if env_model:
+        return env_model
+    return settings.llm_model or "gpt-4o-mini"
+
+
+def _strip_response_wrappers(text: str) -> str:
+    cleaned = text.strip()
+    if cleaned.startswith("```") and cleaned.endswith("```"):
+        lines = cleaned.splitlines()
+        if len(lines) >= 3:
+            cleaned = "\n".join(lines[1:-1]).strip()
+    return cleaned
+
+
+def clean_text_with_llm(raw_text: str) -> str:
+    """使用 DataMind 配置的 OpenAI 兼容接口清洗文本。"""
+    if not isinstance(raw_text, str) or raw_text.strip() == "":
+        return raw_text
+
+    if not (settings.llm_api_key or "").strip():
+        raise ValueError("llm_api_key 未配置，无法调用 LLM 清洗文本。")
+
+    system_prompt = _load_clean_prompt()
+    messages = [
+        {"role": "system", "content": system_prompt},
+        {"role": "user", "content": raw_text},
+    ]
+
+    client = _get_cleaner_client()
+    response = client.chat.completions.create(
+        model=_get_cleaner_model_name(),
+        messages=messages,
+        temperature=0,
+        max_tokens=4096,
+    )
+    response_text = (response.choices[0].message.content or "").strip()
+    cleaned = _strip_response_wrappers(response_text)
+
+    # 防止模型偶发返回空串，避免丢失原始内容
+    return cleaned if cleaned else raw_text
+
+
+def should_skip_existing(input_file: Path, output_file: Path) -> bool:
+    """
+    判断是否应跳过已存在的输出文件。
+    条件：输出文件存在，且其内部 page 数量与输入文件相同。
+    """
+    if not output_file.exists():
+        return False
+
+    try:
+        with open(input_file, "r", encoding="utf-8") as f_in:
+            input_data = json.load(f_in)
+        with open(output_file, "r", encoding="utf-8") as f_out:
+            output_data = json.load(f_out)
+    except (json.JSONDecodeError, IOError):
+        return False  # 文件损坏则重新处理
+
+    # 确保都是列表，且长度一致
+    if isinstance(input_data, list) and isinstance(output_data, list):
+        return len(input_data) == len(output_data)
+    return False
+
+
+def process_single_file(input_path: Path, output_path: Path) -> None:
+    """
+    处理单个 JSON 文件：
+    1. 读取原始 JSON
+    2. 清洗所有 text 字段
+    3. 写入输出路径
+    """
+    with open(input_path, "r", encoding="utf-8") as f:
+        data = json.load(f)
+
+    # 确保数据格式正确
+    if not isinstance(data, list):
+        print(f"警告：{input_path} 不是预期的列表格式，跳过")
+        return
+
+    cleaned_data = []
+    for item in data:
+        if not isinstance(item, dict) or "text" not in item:
+            # 保留不符合格式的项原样
+            cleaned_data.append(item)
+            continue
+
+        # 深拷贝一份，避免修改原数据
+        new_item = item.copy()
+        raw_text = item.get("text", "")
+        cleaned_text = clean_text_with_llm(raw_text)
+        new_item["text"] = cleaned_text
+        cleaned_data.append(new_item)
+
+    # 确保输出目录存在
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    with open(output_path, "w", encoding="utf-8") as f:
+        json.dump(cleaned_data, f, ensure_ascii=False, indent=2)
+
+
+def process_wrapper(input_file: Path, output_root: Path, input_root: Path) -> str:
+    rel_path = input_file.relative_to(input_root)
+    output_file = output_root / rel_path
+    if should_skip_existing(input_file, output_file):
+        return "skipped"
+    process_single_file(input_file, output_file)
+    return "done"
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="批量清洗 OCR JSON 中的 text 字段")
+    parser.add_argument(
+        "--input_root",
+        type=str,
+        required=True,
+        help="输入根目录，包含多个子文件夹的 JSON 文件",
+    )
+    parser.add_argument(
+        "--output_root",
+        type=str,
+        required=True,
+        help="输出根目录，保持相同的子目录结构",
+    )
+    args = parser.parse_args()
+
+    input_root = Path(args.input_root)
+    output_root = Path(args.output_root)
+
+    if not input_root.exists():
+        print(f"错误：输入目录 {input_root} 不存在")
+        return
+
+    # 收集所有 JSON 文件
+    json_files = list(input_root.rglob("*.json"))
+    print(f"找到 {len(json_files)} 个 JSON 文件")
+
+    from concurrent.futures import ThreadPoolExecutor, as_completed
+
+    with ThreadPoolExecutor(max_workers=3) as executor:
+        futures = {
+            executor.submit(process_wrapper, f, output_root, input_root): f
+            for f in json_files
+        }
+        for future in tqdm(as_completed(futures), total=len(futures), desc="处理进度"):
+            future.result()
+            
+if __name__ == "__main__":
+    main()
\ No newline at end of file
diff --git a/modules/prompts/Data_clean_prompt.txt b/modules/prompts/Data_clean_prompt.txt
new file mode 100644
index 0000000..ba8bb55
--- /dev/null
+++ b/modules/prompts/Data_clean_prompt.txt
@@ -0,0 +1,41 @@
+You are an OCR text-cleaning assistant.
+
+Your goal is to clean noisy OCR output while preserving factual content for downstream retrieval and QA.
+
+Focus on high-impact fixes only:
+
+1) Line breaks and spacing
+- Merge broken lines when they split one sentence/word.
+- Fix obvious glued words and wrongly split words.
+- Collapse excessive blank lines and repeated spaces.
+
+2) Common OCR confusions
+- Fix obvious character confusions when context is clear, such as:
+  - o/O <-> 0, l/I <-> 1, rn <-> m, and similar high-confidence errors.
+- Fix obvious transposition errors in words (e.g., "Traning" -> "Training").
+
+3) Duplicates and noise
+- Remove duplicated lines/phrases caused by OCR repetition.
+- Remove obvious stray symbols/noise characters that do not carry meaning.
+- Keep meaningful punctuation and separators.
+
+4) Math and LaTeX preservation
+- Preserve valid LaTeX/math structures if present:
+  - `\begin{...}`, `\end{...}`, `$...$`, `$$...$$`, `\[...\]`
+- Only do conservative repairs for clearly broken math tokens.
+- Do not rewrite formulas semantically.
+
+5) Table-like content preservation
+- Keep table content readable.
+- If table borders/alignment are broken, output a clean plain-text table-like layout.
+- Do not fabricate missing cells or values.
+
+6) Fidelity constraints
+- Do NOT summarize, paraphrase, or reorder content.
+- Do NOT add new facts.
+- Keep dates, numbers, names, URLs, units, and domain terms.
+- If uncertain, keep the original text segment.
+
+Output requirements:
+- Return cleaned text only.
+- No explanations, no comments, no markdown wrappers.
\ No newline at end of file