diff --git a/app/ai/resume_diagnoser/diagnoser.py b/app/ai/resume_diagnoser/diagnoser.py
index e4d5880..94067dd 100644
--- a/app/ai/resume_diagnoser/diagnoser.py
+++ b/app/ai/resume_diagnoser/diagnoser.py
@@ -9,7 +9,7 @@ from langchain_core.output_parsers import StrOutputParser
 from langchain_core.prompts import ChatPromptTemplate
 
 from app.ai.models import LLM
-from app.ai.resume_diagnoser.prompts import DIAGNOSE_MODULE_PROMPT, SUMMARY_PROMPT
+from app.ai.resume_diagnoser.prompts import DIAGNOSE_MODULE_PROMPT, SUMMARY_PROMPT, POLISH_PROMPT
 from app.core.logger import log
 
 
@@ -62,6 +62,45 @@ async def generate_summary(grade: str, urgent_total: int, important_total: int,
         return "简历诊断已完成，请查看各模块的详细诊断结果。"
 
 
+_polish_chain = (
+    ChatPromptTemplate.from_messages([("system", POLISH_PROMPT), ("human", "请开始优化。")])
+    | LLM.CLAUDE_SONNET_4.create(temperature=0.3)
+    | StrOutputParser()
+)
+
+
+async def polish_content(module_type: str, reference_content: list[dict] | str | None,
+                         user_content: list[str], is_summary: bool) -> list[str]:
+    """润色用户编辑后的文本"""
+    ref_text = ""
+    if reference_content:
+        if isinstance(reference_content, list):
+            ref_text = "\n".join(
+                item.get("text", "") if isinstance(item, dict) else str(item)
+                for item in reference_content
+            )
+        else:
+            ref_text = str(reference_content)
+    if not ref_text:
+        ref_text = "无"
+
+    inp = {
+        "module_type": module_type,
+        "reference_content": ref_text,
+        "user_content": "\n".join(user_content),
+        "summary_constraint": "- 注意：此模块只能输出一个段落，数组只能有一个元素" if is_summary else "",
+    }
+    try:
+        raw = await _polish_chain.ainvoke(inp)
+        result = _parse_json(raw)
+        if isinstance(result, list):
+            return [str(item) for item in result]
+        return [str(result)]
+    except Exception as e:
+        log.warning(f"AI润色失败: {e}")
+        return user_content
+
+
 async def _safe_invoke(task: dict) -> dict:
     """单条记录诊断，失败返回空结果"""
     raw = ""
diff --git a/app/ai/resume_diagnoser/prompts.py b/app/ai/resume_diagnoser/prompts.py
index 0767bbf..2ba6c08 100644
--- a/app/ai/resume_diagnoser/prompts.py
+++ b/app/ai/resume_diagnoser/prompts.py
@@ -77,3 +77,26 @@ SUMMARY_PROMPT = """你是一位资深简历顾问。请根据以下简历诊断
 4. 一句鼓励或行动建议
 
 直接输出评价文本，不要输出JSON或其他格式标记。控制在300字以内。"""
+
+POLISH_PROMPT = """你是一位资深简历顾问。请对用户提供的简历描述文本进行润色优化，让语言更精练、更专业。
+
+## 模块类型
+{module_type}
+
+## AI 之前的优化版本（仅供参考）
+{reference_content}
+
+## 用户提交的文本（以此为主进行优化）
+{user_content}
+
+## 优化要求
+- 以用户提交的文本为主体进行润色，AI之前的版本仅作参考
+- 让语言更精练、更专业，去除冗余表达
+- 尽量使用数据量化成果
+- 保持原意不变，不凭空捏造内容
+- 输出为 JSON 数组格式，每个元素是一个段落的纯文本
+{summary_constraint}
+
+## 输出格式
+严格输出 JSON 数组，不要输出其他内容：
+["优化后的段落1", "优化后的段落2"]"""
diff --git a/app/api/resume_diagnose.py b/app/api/resume_diagnose.py
index 90af040..0a8b7ab 100644
--- a/app/api/resume_diagnose.py
+++ b/app/api/resume_diagnose.py
@@ -3,7 +3,7 @@
 from fastapi import APIRouter
 from pydantic import BaseModel, Field
 
-from app.ai.resume_diagnoser.diagnoser import diagnose_all, generate_summary
+from app.ai.resume_diagnoser.diagnoser import diagnose_all, generate_summary, polish_content
 from app.core.context import RequestContext
 from app.core.database import get_db
 from app.services.resume_diagnose_service import ResumeDiagnoseService, aggregate_results
@@ -83,3 +83,25 @@ async def feedback_issue(issue_id: int, param: FeedbackParam):
     async for session in get_db():
         service = ResumeDiagnoseService(session)
         await service.update_feedback(issue_id, user_id, param.user_feedback)
+
+
+class PolishParam(BaseModel):
+    content: list[str] = Field(..., description="用户编辑后的文本段落数组")
+
+
+@router.post("/issue/{issue_id}/polish", summary="AI润色用户编辑的文本")
+async def polish_issue_content(issue_id: int, param: PolishParam):
+    """基于诊断问题上下文，AI润色用户编辑后的文本"""
+    user_id = RequestContext.user_id.get()
+
+    async for session in get_db():
+        service = ResumeDiagnoseService(session)
+        ctx = await service.get_issue_for_polish(issue_id, user_id)
+
+    result = await polish_content(
+        module_type=ctx["module_label"],
+        reference_content=ctx["optimized_content"],
+        user_content=param.content,
+        is_summary=ctx["is_summary"],
+    )
+    return {"content": result}
diff --git a/app/services/resume_diagnose_service.py b/app/services/resume_diagnose_service.py
index 70aaf28..22fc32e 100644
--- a/app/services/resume_diagnose_service.py
+++ b/app/services/resume_diagnose_service.py
@@ -160,6 +160,21 @@ class ResumeDiagnoseService:
         issue.user_feedback = user_feedback
         await self.session.flush()
 
+    async def get_issue_for_polish(self, issue_id: int, user_id: int) -> dict:
+        """获取 issue 润色所需的上下文信息"""
+        result = await self.session.execute(
+            select(ResumeDiagnosisIssue).where(
+                ResumeDiagnosisIssue.id == issue_id, ResumeDiagnosisIssue.user_id == user_id))
+        issue = result.scalar_one_or_none()
+        if issue is None:
+            raise ValueError("诊断问题不存在")
+        return {
+            "module_type": issue.module_type,
+            "module_label": _MODULE_LABELS.get(issue.module_type, issue.module_type),
+            "optimized_content": issue.optimized_content,
+            "is_summary": issue.module_type == "summary",
+        }
+
 
 # ===== 工具函数 =====