diff --git a/src/main/java/com/codechecker/cache/schema/SkeletonJsonRenderer.java b/src/main/java/com/codechecker/cache/schema/SkeletonJsonRenderer.java
index 4d57c04..17c0758 100644
--- a/src/main/java/com/codechecker/cache/schema/SkeletonJsonRenderer.java
+++ b/src/main/java/com/codechecker/cache/schema/SkeletonJsonRenderer.java
@@ -45,7 +45,7 @@ public class SkeletonJsonRenderer {
     private Node buildTree(TypeSchema schema) {
         Node root = new Node(JsonType.OBJECT);
         for (FieldSchema field : schema.getFields().values()) {
-            putPath(root, field.getPath(), field.getJsonType());
+            putPath(root, field.getPath(), field.getJsonType(), field.getJavaType());
         }
         // 根数组：字段以 [] / [].xxx 记录
         if (root.children.size() == 1 && root.children.containsKey("[]")) {
@@ -56,7 +56,7 @@ public class SkeletonJsonRenderer {
         return root;
     }
 
-    private void putPath(Node root, String path, JsonType type) {
+    private void putPath(Node root, String path, JsonType type, String javaType) {
         List<Seg> segs = parsePath(path);
         if (segs.isEmpty()) {
             return;
@@ -70,10 +70,9 @@ public class SkeletonJsonRenderer {
                 arr.type = JsonType.ARRAY;
                 Node elem = arr.children.computeIfAbsent("[]", k -> new Node(JsonType.OBJECT));
                 if (last) {
-                    if (type == JsonType.OBJECT || type == JsonType.ARRAY || type == JsonType.MAP) {
-                        elem.type = type;
-                    } else {
-                        elem.type = type;
+                    elem.type = type;
+                    elem.javaType = javaType;
+                    if (type != JsonType.OBJECT && type != JsonType.ARRAY && type != JsonType.MAP) {
                         elem.leaf = true;
                     }
                 }
@@ -83,6 +82,7 @@ public class SkeletonJsonRenderer {
                         k -> new Node(last ? type : JsonType.OBJECT));
                 if (last) {
                     child.type = type;
+                    child.javaType = javaType;
                     child.leaf = type != JsonType.OBJECT && type != JsonType.ARRAY && type != JsonType.MAP;
                 } else if (child.type != JsonType.ARRAY) {
                     child.type = JsonType.OBJECT;
@@ -129,7 +129,7 @@ public class SkeletonJsonRenderer {
             return "[" + write(elem, elemPath, protectedPaths, compact) + "]";
         }
         if (node.leaf || isScalar(node.type)) {
-            return placeholder(node.type);
+            return placeholder(node.type, node.javaType);
         }
         if (node.type == JsonType.MAP) {
             return "{}";
@@ -161,7 +161,7 @@ public class SkeletonJsonRenderer {
             } else if (child.type == JsonType.ARRAY) {
                 sb.append(write(child, childPath, protectedPaths, compact));
             } else if (child.leaf || isScalar(child.type)) {
-                sb.append(placeholder(child.type));
+                sb.append(placeholder(child.type, child.javaType));
             } else {
                 sb.append(write(child, childPath, protectedPaths, compact));
             }
@@ -177,7 +177,7 @@ public class SkeletonJsonRenderer {
         if (child.type == JsonType.OBJECT || child.type == JsonType.MAP) {
             return "\"...\"";
         }
-        return placeholder(child.type);
+        return placeholder(child.type, child.javaType);
     }
 
     private boolean isProtectedUnder(String pathPrefix, Set<String> protectedPaths) {
@@ -327,13 +327,17 @@ public class SkeletonJsonRenderer {
                 || type == JsonType.BOOLEAN || type == JsonType.UNKNOWN;
     }
 
-    private String placeholder(JsonType type) {
+    /**
+     * 数字类型示意占位（合法 JSON number）：整数 {@code 0}、浮点 {@code 0.0}、BigDecimal {@code 0.00}。
+     * 仅用于通知可读性，不代表真实精度/scale。
+     */
+    private String placeholder(JsonType type, String javaType) {
         if (type == null) {
             return "null";
         }
         switch (type) {
             case NUMBER:
-                return "0";
+                return numberPlaceholder(javaType);
             case BOOLEAN:
                 return "false";
             case STRING:
@@ -349,6 +353,37 @@ public class SkeletonJsonRenderer {
         }
     }
 
+    private String numberPlaceholder(String javaType) {
+        String simple = simpleJavaType(javaType);
+        if ("BigDecimal".equals(simple)) {
+            return "0.00";
+        }
+        if ("float".equals(simple) || "Float".equals(simple)
+                || "double".equals(simple) || "Double".equals(simple)) {
+            return "0.0";
+        }
+        return "0";
+    }
+
+    private static String simpleJavaType(String javaType) {
+        if (javaType == null) {
+            return "";
+        }
+        String s = javaType.trim();
+        if (s.isEmpty()) {
+            return "";
+        }
+        int lt = s.indexOf('<');
+        if (lt > 0) {
+            s = s.substring(0, lt).trim();
+        }
+        int dot = s.lastIndexOf('.');
+        if (dot >= 0 && dot < s.length() - 1) {
+            s = s.substring(dot + 1);
+        }
+        return s;
+    }
+
     private String escape(String s) {
         return s.replace("\\", "\\\\").replace("\"", "\\\"");
     }
@@ -365,6 +400,7 @@ public class SkeletonJsonRenderer {
 
     private static final class Node {
         JsonType type;
+        String javaType;
         boolean leaf;
         final Map<String, Node> children = new LinkedHashMap<>();
 
diff --git a/src/test/java/com/codechecker/cache/schema/SkeletonJsonRendererTest.java b/src/test/java/com/codechecker/cache/schema/SkeletonJsonRendererTest.java
index caf8d8b..0b0c3ae 100644
--- a/src/test/java/com/codechecker/cache/schema/SkeletonJsonRendererTest.java
+++ b/src/test/java/com/codechecker/cache/schema/SkeletonJsonRendererTest.java
@@ -80,4 +80,31 @@ class SkeletonJsonRendererTest {
                 "截断后仍应保留改动相关字段: " + truncated);
         assertEquals(true, truncated.length() >= 10);
     }
+
+    @Test
+    void numberPlaceholdersDistinguishIntegerFloatAndBigDecimal() {
+        TypeSchema schema = new TypeSchema("MoneyVo");
+        schema.add(new FieldSchema("count", JsonType.NUMBER, "Integer"));
+        schema.add(new FieldSchema("rate", JsonType.NUMBER, "Double"));
+        schema.add(new FieldSchema("amount", JsonType.NUMBER, "BigDecimal"));
+        schema.add(new FieldSchema("score", JsonType.NUMBER, "Float"));
+
+        String json = new SkeletonJsonRenderer().render(schema);
+        assertTrue(json.contains("\"count\":0"), json);
+        assertTrue(json.contains("\"rate\":0.0"), json);
+        assertTrue(json.contains("\"amount\":0.00"), json);
+        assertTrue(json.contains("\"score\":0.0"), json);
+    }
+
+    @Test
+    void integerToBigDecimalSkeletonsLookDifferent() {
+        TypeSchema oldS = new TypeSchema("A");
+        oldS.add(new FieldSchema("amount", JsonType.NUMBER, "Integer"));
+        TypeSchema newS = new TypeSchema("A");
+        newS.add(new FieldSchema("amount", JsonType.NUMBER, "BigDecimal"));
+
+        SkeletonJsonRenderer renderer = new SkeletonJsonRenderer();
+        assertEquals("{\"amount\":0}", renderer.render(oldS));
+        assertEquals("{\"amount\":0.00}", renderer.render(newS));
+    }
 }