diff --git a/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongArraySerializer.java b/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongArraySerializer.java
new file mode 100644
index 00000000..1b59ee0a
--- /dev/null
+++ b/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongArraySerializer.java
@@ -0,0 +1,43 @@
+package com.zt.plat.framework.common.util.json.databind;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+
+import java.io.IOException;
+
+/**
+ * Long / long 数组序列化器，统一按字符串输出以规避 JS 精度问题。
+ */
+public class LongArraySerializer extends StdSerializer<Object> {
+
+    public static final LongArraySerializer INSTANCE = new LongArraySerializer();
+
+    private LongArraySerializer() {
+        super(Object.class);
+    }
+
+    @Override
+    public void serialize(Object value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+        gen.writeStartArray();
+        if (value instanceof long[]) {
+            long[] array = (long[]) value;
+            for (long element : array) {
+                // 原生 long 必定有值，直接走 NumberSerializer
+                NumberSerializer.INSTANCE.serialize(element, gen, provider);
+            }
+            gen.writeEndArray();
+            return;
+        }
+
+        Long[] array = (Long[]) value;
+        for (Long element : array) {
+            if (element == null) {
+                provider.defaultSerializeNull(gen);
+                continue;
+            }
+            NumberSerializer.INSTANCE.serialize(element, gen, provider);
+        }
+        gen.writeEndArray();
+    }
+}
diff --git a/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongCollectionSerializer.java b/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongCollectionSerializer.java
new file mode 100644
index 00000000..45d94283
--- /dev/null
+++ b/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongCollectionSerializer.java
@@ -0,0 +1,37 @@
+package com.zt.plat.framework.common.util.json.databind;
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+import com.fasterxml.jackson.databind.type.TypeFactory;
+
+import java.io.IOException;
+import java.util.Collection;
+
+/**
+ * 将 {@link Collection} 中的 Long 元素序列化成字符串，避免 JavaScript 精度问题。
+ */
+public class LongCollectionSerializer extends StdSerializer<Collection<?>> {
+
+    public static final LongCollectionSerializer INSTANCE = new LongCollectionSerializer();
+
+    private LongCollectionSerializer() {
+        super(TypeFactory.defaultInstance().constructCollectionType(Collection.class, Object.class));
+    }
+
+    @Override
+    public void serialize(Collection<?> value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+        // 传入集合本身与元素数量，方便 Jackson 合理推测数组边界
+        gen.writeStartArray(value, value.size());
+        for (Object element : value) {
+            if (element == null) {
+                // 允许集合中存在 null，保持 Jackson 默认的 null 序列化行为
+                provider.defaultSerializeNull(gen);
+                continue;
+            }
+            // 所有 Long/long 元素统一走 NumberSerializer，保证前端精度
+            NumberSerializer.INSTANCE.serialize((Number) element, gen, provider);
+        }
+        gen.writeEndArray();
+    }
+}
diff --git a/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongTypeSerializerModifier.java b/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongTypeSerializerModifier.java
new file mode 100644
index 00000000..f19f3024
--- /dev/null
+++ b/zt-framework/zt-common/src/main/java/com/zt/plat/framework/common/util/json/databind/LongTypeSerializerModifier.java
@@ -0,0 +1,52 @@
+package com.zt.plat.framework.common.util.json.databind;
+
+import com.fasterxml.jackson.databind.BeanDescription;
+import com.fasterxml.jackson.databind.JsonSerializer;
+import com.fasterxml.jackson.databind.SerializationConfig;
+import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
+import com.fasterxml.jackson.databind.type.ArrayType;
+import com.fasterxml.jackson.databind.type.CollectionType;
+import com.fasterxml.jackson.databind.type.CollectionLikeType;
+import com.fasterxml.jackson.databind.JavaType;
+
+/**
+ * 针对 Long 相关集合、数组的序列化增强，确保统一走 Long 的自定义序列化逻辑。
+ */
+public class LongTypeSerializerModifier extends BeanSerializerModifier {
+
+    @Override
+    public JsonSerializer<?> modifyCollectionSerializer(SerializationConfig config, CollectionType valueType,
+                                                        BeanDescription beanDesc, JsonSerializer<?> serializer) {
+        // List、Set 等容器若包含 Long，则切换到 LongCollectionSerializer
+        return needsLongCollectionSerializer(valueType.getContentType()) ? LongCollectionSerializer.INSTANCE : serializer;
+    }
+
+    @Override
+    public JsonSerializer<?> modifyCollectionLikeSerializer(SerializationConfig config, CollectionLikeType valueType,
+                                                            BeanDescription beanDesc, JsonSerializer<?> serializer) {
+        // 处理 CollectionLike（如 Page、Optional 等）中的 Long 元素
+        return needsLongCollectionSerializer(valueType.getContentType()) ? LongCollectionSerializer.INSTANCE : serializer;
+    }
+
+    @Override
+    public JsonSerializer<?> modifyArraySerializer(SerializationConfig config, ArrayType valueType,
+                                                   BeanDescription beanDesc, JsonSerializer<?> serializer) {
+        // 针对 long[]、Long[] 两种数组使用统一的数组序列化器
+        Class<?> rawClass = valueType.getRawClass();
+        if (long[].class.equals(rawClass)) {
+            return LongArraySerializer.INSTANCE;
+        }
+        if (Long[].class.equals(rawClass)) {
+            return LongArraySerializer.INSTANCE;
+        }
+        return serializer;
+    }
+
+    private boolean needsLongCollectionSerializer(JavaType contentType) {
+        if (contentType == null) {
+            return false;
+        }
+        Class<?> rawClass = contentType.getRawClass();
+        return Long.class.equals(rawClass) || Long.TYPE.equals(rawClass);
+    }
+}
diff --git a/zt-gateway/src/main/java/com/zt/plat/gateway/jackson/JacksonAutoConfiguration.java b/zt-gateway/src/main/java/com/zt/plat/gateway/jackson/JacksonAutoConfiguration.java
index 1bc54e1b..ef394ad0 100644
--- a/zt-gateway/src/main/java/com/zt/plat/gateway/jackson/JacksonAutoConfiguration.java
+++ b/zt-gateway/src/main/java/com/zt/plat/gateway/jackson/JacksonAutoConfiguration.java
@@ -2,6 +2,7 @@ package com.zt.plat.gateway.jackson;
 
 import cn.hutool.core.collection.CollUtil;
 import com.zt.plat.framework.common.util.json.JsonUtils;
+import com.zt.plat.framework.common.util.json.databind.LongTypeSerializerModifier;
 import com.zt.plat.framework.common.util.json.databind.NumberSerializer;
 import com.zt.plat.framework.common.util.json.databind.TimestampLocalDateTimeDeserializer;
 import com.zt.plat.framework.common.util.json.databind.TimestampLocalDateTimeSerializer;
@@ -39,6 +40,7 @@ public class JacksonAutoConfiguration {
                 // 新增 LocalDateTime 序列化、反序列化规则，使用 Long 时间戳
                 .addSerializer(LocalDateTime.class, TimestampLocalDateTimeSerializer.INSTANCE)
                 .addDeserializer(LocalDateTime.class, TimestampLocalDateTimeDeserializer.INSTANCE);
+        simpleModule.setSerializerModifier(new LongTypeSerializerModifier());
         // 1.2 注册到 objectMapper
         objectMappers.forEach(objectMapper -> objectMapper.registerModule(simpleModule));