diff --git a/hikyuu_cpp/hikyuu/KData.cpp b/hikyuu_cpp/hikyuu/KData.cpp
index 1297477dd..daf32bbef 100644
--- a/hikyuu_cpp/hikyuu/KData.cpp
+++ b/hikyuu_cpp/hikyuu/KData.cpp
@@ -32,7 +32,7 @@ KData::KData(const Stock& stock, const KQuery& query) {
     }
 }
 
-bool KData::operator==(const KData& thr) {
+bool KData::operator==(const KData& thr) const {
     return this == &thr || m_imp == thr.m_imp ||
            (getStock() == thr.getStock() && getQuery() == thr.getQuery());
 }
diff --git a/hikyuu_cpp/hikyuu/KData.h b/hikyuu_cpp/hikyuu/KData.h
index 50b636be3..932ab9367 100644
--- a/hikyuu_cpp/hikyuu/KData.h
+++ b/hikyuu_cpp/hikyuu/KData.h
@@ -33,7 +33,8 @@ class HKU_API KData {
     size_t size() const;
     bool empty() const;
 
-    bool operator==(const KData&);
+    bool operator==(const KData&) const;
+    bool operator!=(const KData&) const;
 
     DatetimeList getDatetimeList() const;
 
@@ -217,6 +218,10 @@ inline size_t KData::lastPos() const {
     return m_imp ? m_imp->lastPos() : 0;
 }
 
+inline bool KData::operator!=(const KData& other) const {
+    return !(*this == other);
+}
+
 } /* namespace hku */
 
 #if FMT_VERSION >= 90000
diff --git a/hikyuu_pywrap/_KData.cpp b/hikyuu_pywrap/_KData.cpp
index 610632aa8..da0cf8ffe 100644
--- a/hikyuu_pywrap/_KData.cpp
+++ b/hikyuu_pywrap/_KData.cpp
@@ -88,6 +88,10 @@ void export_KData() {
     :param str filename: 指定保存的文件名称)")
 
       .def("__len__", &KData::size)
+
+      .def(self == self)
+      .def(self != self)
+
 #if HKU_PYTHON_SUPPORT_PICKLE
       .def_pickle(normal_pickle_suite<KData>())
 #endif