diff --git a/App/AstRouter.py b/App/AstRouter.py
new file mode 100644
index 0000000..9fd7029
--- /dev/null
+++ b/App/AstRouter.py
@@ -0,0 +1,51 @@
+import ast
+import json
+import os
+from typing import Dict, Union
+from fastapi import APIRouter, HTTPException
+from pydantic import BaseModel
+from starlette import status
+
+ast_router = APIRouter()
+
+
+class CalculationInput(BaseModel):
+    params: Dict[str, Union[int, float]]
+    formula_name: str
+
+
+def calculate_expression(expression: ast.Expression, params: Dict) -> float:
+    """
+    使用AST模块计算安全的表达式
+    """
+    try:
+        code = compile(expression, "<string>", "eval")
+        result = eval(code, {}, params)
+        return result
+    except SyntaxError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="公式语法错误：" + str(e))
+    except NameError as e:
+        raise HTTPException(status_code=status.HTTP_422_UNPROCESSABLE_ENTITY, detail="公式中存在未定义的变量：" + str(e))
+    except TypeError as e:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST,
+                            detail="公式中的某些操作不支持所提供的参数类型：" + str(e))
+    except Exception as e:
+        raise HTTPException(status_code=status.HTTP_500_INTERNAL_SERVER_ERROR, detail="执行公式时出现错误：" + str(e))
+
+
+@ast_router.post("/calculate_ast", summary="传入指标名称与参数进行计算", tags=['指标计算'])
+def calculate(request: CalculationInput):
+    name = request.formula_name
+    data = request.params
+
+    # 查询公式
+    with open(os.getcwd() + '\\App\\FormulaData.json', encoding='utf-8') as f:
+        calculation = json.load(f)
+    try:
+        item = calculation.get(name)
+        formula = item.get('formula')
+        expression_ast = ast.parse(formula, mode="eval")
+        result = calculate_expression(expression_ast, data)
+        return {"result": round(result, request.precision) if hasattr(request, 'precision') else round(result, 2)}
+    except AttributeError:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="公式名称错误")
diff --git a/App/FormulaData.json b/App/FormulaData.json
new file mode 100644
index 0000000..c83fe87
--- /dev/null
+++ b/App/FormulaData.json
@@ -0,0 +1,60 @@
+{
+  "债务率": {
+    "type": "定量",
+    "formula": "地方政府债务余额 / 地方政府综合财力 * 100",
+    "params": [
+      "地方政府债务余额",
+      "地方政府综合财力"
+    ]
+  },
+  "不良贷款率": {
+    "type": "定量",
+    "formula": "(次级类贷款 + 可疑类贷款 + 损失类贷款)  / 各项贷款 * 100",
+    "params": [
+      "次级类贷款",
+      "可疑类贷款",
+      "损失类贷款",
+      "各项贷款"
+    ]
+  },
+  "拨备覆盖率": {
+    "type": "定量",
+    "formula": "应收融资租赁款减值准备 / 不良应收融资租赁款 * 100",
+    "params": [
+      "应收融资租赁款减值准备",
+      "不良应收融资租赁款"
+    ]
+  },
+  "拨备覆盖率_商业银行": {
+    "type": "定量",
+    "formula": "贷款损失准备 / 不良贷款余额 * 100",
+    "params": [
+      "贷款损失准备",
+      "不良贷款余额"
+    ]
+  },
+  "核心一级资本充足率": {
+    "type": "定量",
+    "formula": "(核心一级资本 + 对应资本扣除项) / 风险加权资产 * 100",
+    "params": [
+      "核心一级资本",
+      "对应资本扣除项",
+      "风险加权资产"
+    ]
+  },
+  "综合偿付能力充足率": {
+    "type": "定量",
+    "formula": "实际资本 / 200000000 * 100",
+    "params": [
+      "实际资本"
+    ]
+  },
+  "资本资产比率": {
+    "type": "定量",
+    "formula": "所有者权益 / 总资产 * 100",
+    "params": [
+      "所有者权益",
+      "总资产"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/App/__init__.py b/App/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/main.py b/main.py
index 3fd448a..952b3bb 100644
--- a/main.py
+++ b/main.py
@@ -3,6 +3,7 @@ from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
 import 基本信用评级指标
+from App.AstRouter import ast_router
 
 app = FastAPI(
     title="指标函数计算接口",
@@ -19,11 +20,10 @@ app.add_middleware(
     allow_headers=["*"],
 )
 
-
 # 路由
 PREFIX = "/api/index_function"
-app.include_router(基本信用评级指标.router, prefix=PREFIX)
-
+# app.include_router(基本信用评级指标.router, prefix=PREFIX)
+app.include_router(ast_router, prefix=PREFIX)
 
 if __name__ == "__main__":
-    uvicorn.run(app, host="127.0.0.1", port=8002)
\ No newline at end of file
+    uvicorn.run(app, host="127.0.0.1", port=8002)