diff --git a/tencentcloud/common/abstract_client.py b/tencentcloud/common/abstract_client.py
index 878be45d0..1706806c2 100644
--- a/tencentcloud/common/abstract_client.py
+++ b/tencentcloud/common/abstract_client.py
@@ -389,6 +389,9 @@ def _process_response_sse(resp):
             colon_idx = line.find(':')
             key = line[:colon_idx]
             val = line[colon_idx + 1:]
+            # If value starts with a U+0020 SPACE character, remove it from value.
+            if val and val[0] == " ":
+                val = val[1:]
             if key == 'data':
                 # The spec allows for multiple data fields per event, concatenated them with "\n".
                 if 'data' not in e: