diff --git a/src/Common/eval.ts b/src/Common/eval.ts
index 9f08ac0ee..576be0e9d 100644
--- a/src/Common/eval.ts
+++ b/src/Common/eval.ts
@@ -84,10 +84,13 @@ export function eval2(expr: string, params?: {}, defaultParam?: string): number
     let result = eval(code);
 
     if (typeof result === "function")
-        return result();
+        result = result();
 
     if (typeof result === "bigint")
-        return Number(result);//防止bigint乱入
+        result = Number(result);//防止bigint乱入
+
+    if (typeof result !== "number")
+        throw "计算结果不是实数!";
 
     return result;
 }
diff --git a/src/UI/Components/RightPanel/TemplateParamPanel.tsx b/src/UI/Components/RightPanel/TemplateParamPanel.tsx
index a1ba3f264..c5719d626 100644
--- a/src/UI/Components/RightPanel/TemplateParamPanel.tsx
+++ b/src/UI/Components/RightPanel/TemplateParamPanel.tsx
@@ -706,7 +706,7 @@ export class TemplateParamDetail extends React.Component<{}>
                                         }}
                                         title={par.name}
                                     >{par.name}</span>
-                                    <span>{FixedNotZero(par.value, 2)}</span>
+                                    <span>{typeof par.value === "number" ? FixedNotZero(par.value, 2) : par.value}</span>
                                     <span style={{ whiteSpace: "nowrap", overflow: "hidden", textOverflow: "ellipsis", padding: "0 2px" }} title={par.description}>{par.description}</span>
                                     {
                                         par.type === TemplateParamType.Material ?