diff --git a/paddle/phi/kernels/xpu/reduce.h b/paddle/phi/kernels/xpu/reduce.h
index a9ba6c1ac1347ac459ed9dbfe8fd53e3843d0b82..1507024265e23d68dadd77ae52c78f429bad6b74 100644
--- a/paddle/phi/kernels/xpu/reduce.h
+++ b/paddle/phi/kernels/xpu/reduce.h
@@ -78,7 +78,7 @@ int XPUReduce(const Context& dev_ctx,
     r = xpu::copy<XPUType>(dev_ctx.x_context(),
                            reinterpret_cast<const XPUType*>(x_data),
                            reinterpret_cast<XPUType*>(y_data),
-                           x.numel() * sizeof(T));
+                           x.numel());
     PADDLE_ENFORCE_XDNN_SUCCESS(r, "copy");
   } else {
     r = func(dev_ctx.x_context(), x_data, y_data, xdims, reduce_dims);
@@ -100,7 +100,7 @@ void ReduceKernelImpl(const DeviceContext& dev_ctx,
     int r = xpu::copy<XPUType>(dev_ctx.x_context(),
                                reinterpret_cast<const XPUType*>(x_data),
                                reinterpret_cast<XPUType*>(y_data),
-                               input.numel() * sizeof(T));
+                               input.numel());
     PADDLE_ENFORCE_XDNN_SUCCESS(r, "copy");
   } else {
     Functor func;