diff --git a/examples/high_freq/highfreq_processor.py b/examples/high_freq/highfreq_processor.py
index c6b69acae..d2ffe41ce 100644
--- a/examples/high_freq/highfreq_processor.py
+++ b/examples/high_freq/highfreq_processor.py
@@ -10,7 +10,6 @@ class HighFreqNorm(Processor):
         self.fit_end_time = fit_end_time
 
     def fit(self, df_features):
-        print("==============fit==============")
         fetch_df = fetch_df_by_index(df_features, slice(self.fit_start_time, self.fit_end_time), level="datetime")
         del df_features
         df_values = fetch_df.values
@@ -34,7 +33,6 @@ class HighFreqNorm(Processor):
             self.feature_vmin[name] = np.nanmin(part_values)
 
     def __call__(self, df_features):
-        print("==============call==============")
         df_features.set_index("date", append=True, drop=True, inplace=True)
         df_values = df_features.values
         names = {