diff --git a/cmake/flags.cmake b/cmake/flags.cmake
index 010cb6e08ee7d2089da94624567d1c5968e322b0..4c26366c5acf15ef2f78e282e611ad54b4a62b55 100644
--- a/cmake/flags.cmake
+++ b/cmake/flags.cmake
@@ -215,8 +215,13 @@ if(APPLE)
   endif()
   # On Mac OS X register class specifier is deprecated and will cause warning error on latest clang 10.0
   set(COMMON_FLAGS
-      -Wno-deprecated-register -Werror=format
-      -Werror=inconsistent-missing-override -Werror=braced-scalar-init)
+      -Wno-deprecated-register
+      -Werror=format
+      -Werror=inconsistent-missing-override
+      -Werror=braced-scalar-init
+      -Werror=uninitialized
+      -Werror=tautological-constant-out-of-range-compare
+      -Werror=literal-conversion)
 endif()
 
 if(WITH_HETERPS AND WITH_PSLIB)
diff --git a/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h b/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h
index 930de3bdb2df0997fc1772338366b5c01c9765dc..dd4438ba068ac369edc704ab6dbedad8f2f4ffae 100644
--- a/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h
+++ b/paddle/fluid/framework/new_executor/workqueue/nonblocking_threadpool.h
@@ -37,7 +37,7 @@ class ThreadPoolTempl {
       : env_(env),
         allow_spinning_(allow_spinning),
         always_spinning_(always_spinning),
-        global_steal_partition_(EncodePartition(0, num_threads_)),
+        global_steal_partition_(EncodePartition(0, num_threads)),
         blocked_(0),
         num_tasks_(0),
         done_(false),
diff --git a/paddle/fluid/imperative/partial_grad_engine.cc b/paddle/fluid/imperative/partial_grad_engine.cc
index b25bb2af0f8e9eae913f0654df4d26818a8e9847..471627e4ca52499001a2ee5e82e504a5fffea475 100644
--- a/paddle/fluid/imperative/partial_grad_engine.cc
+++ b/paddle/fluid/imperative/partial_grad_engine.cc
@@ -328,7 +328,8 @@ static void FillConstantLike(const VariableWrapper &ref_var,
   // grad mission
   // we can't get data_type_ directly. We need to check if we can only use
   // default data_type for now.
-  if (ref_var.ForwardDataType() != -1) {
+  if (ref_var.ForwardDataType() !=
+      static_cast<framework::proto::VarType::Type>(-1)) {
     dst_tensor->mutable_data(
         place, framework::TransToPhiDataType(ref_var.ForwardDataType()));
   } else {
diff --git a/paddle/fluid/operators/interpolate_op.h b/paddle/fluid/operators/interpolate_op.h
index dbd27f526bd8560707992cbaf175ed21d2fa1785..ff2d5236d78bb8c66ed9a08b850f8c5cf335affd 100644
--- a/paddle/fluid/operators/interpolate_op.h
+++ b/paddle/fluid/operators/interpolate_op.h
@@ -502,7 +502,7 @@ HOSTDEVICE inline T cubic_convolution2(T x, T A) {
 
 template <typename T>
 HOSTDEVICE inline void get_cubic_upsample_coefficients(T coeffs[4], T t) {
-  T A = -0.75;
+  T A = static_cast<T>(-0.75);
 
   T x1 = t;
   coeffs[0] = cubic_convolution2<T>(x1 + 1.0, A);
diff --git a/paddle/phi/kernels/cpu/lstsq_kernel.cc b/paddle/phi/kernels/cpu/lstsq_kernel.cc
index 5542c2ba6e7c5f5be681bc3fff3ae0603bbf1612..6702ea78393fcf2789d6b4f823505e01e9f85141 100644
--- a/paddle/phi/kernels/cpu/lstsq_kernel.cc
+++ b/paddle/phi/kernels/cpu/lstsq_kernel.cc
@@ -128,7 +128,7 @@ void LstsqKernel(const Context& dev_ctx,
 
   // run once the driver, first to get the optimal workspace size
   int lwork = -1;
-  T wkopt;
+  T wkopt = 0.0;
   ValueType rwkopt;
   int iwkopt = 0;