diff --git a/rtc_plugins.cpp b/rtc_plugins.cpp
index 1469588..8673ec6 100644
--- a/rtc_plugins.cpp
+++ b/rtc_plugins.cpp
@@ -33,8 +33,24 @@ int initSend(const char* destRoomId, const int16_t destChannelIndex) {
 }
 int sendCustomAudioData(const int16_t destChannelIndex, py::object pyData, int32_t sampleRate, uint64_t channelNum,
                         uint64_t dataLen) {
-    PyObject* pyObj = pyData.ptr();
-    void* dataPtr = PyArray_DATA((PyArrayObject*)pyObj);
+    // 检查是否为 numpy 数组
+    if (!PyArray_Check(pyData.ptr())) {
+        PyErr_SetString(PyExc_TypeError, "Expected a numpy array");
+        throw py::error_already_set();
+    }
+
+    // 检查数据类型是否为 int16
+    PyArrayObject* npArray = (PyArrayObject*)pyData.ptr();
+    if (PyArray_TYPE(npArray) != NPY_INT16) {
+        PyErr_SetString(PyExc_TypeError, "Array must be of type int16 (np.int16)");
+        throw py::error_already_set();
+    }
+
+    void* dataPtr = PyArray_DATA(npArray);
+    if (dataPtr == nullptr) {
+        PyErr_SetString(PyExc_ValueError, "Invalid data pointer");
+        throw py::error_already_set();
+    }
     return RTCContext::instance().sendCustomAudioData(destChannelIndex, dataPtr, sampleRate, channelNum, dataLen);
 }
 
diff --git a/test_send.py b/test_send.py
index c147ff7..c86e54f 100644
--- a/test_send.py
+++ b/test_send.py
@@ -1,5 +1,6 @@
 import rtc_plugins
 import time
+import numpy as np
 
 srcUserId = "srcUser1"
 destUserId = "destUser1"
@@ -20,8 +21,9 @@ ret = rtc_plugins.initSend(destRoomId, destChannelIndex)
 if ret != 0:
     print(f"initSend fail, ret:{ret}")
     exit(1)
+audioData = np.zeros(16, dtype=np.int16)
 while True:
-    ret = rtc_plugins.sendCustomAudioData(destChannelIndex, "aaaaa", 48000, 1, 10)
+    ret = rtc_plugins.sendCustomAudioData(destChannelIndex, audioData, 48000, 1, len(audioData))
     if ret != 0:
         print(f"send fail, ret:{ret}")
     time.sleep(3)
diff --git a/util/RTCContext.cpp b/util/RTCContext.cpp
index 4098315..2cc090f 100644
--- a/util/RTCContext.cpp
+++ b/util/RTCContext.cpp
@@ -183,6 +183,11 @@ int16_t RTCContext::sendCustomAudioData(const int16_t channelIndex, void* custom
         sleep(3);
     }
     std::lock_guard<std::mutex> lock(mutex_);
+    if (customData == nullptr) {
+        std::cout << "customData is null" << std::endl;
+        return -1;
+    }
+    std::cout << "customData addr is:" << customData << std::endl;
     return rtcEngine_->sendCustomAudioData(channelIndex, customData, sampleRate, channelNum, dataLen);
 }
 mrtc::IMRTCEngine* RTCContext::getRtcEngine() const