diff --git a/be/src/vec/functions/function_bitmap.cpp b/be/src/vec/functions/function_bitmap.cpp
index 6886d53004..d1f6cf432e 100644
--- a/be/src/vec/functions/function_bitmap.cpp
+++ b/be/src/vec/functions/function_bitmap.cpp
@@ -132,7 +132,9 @@ struct ToBitmap {
                         continue;
                     }
                 }
-                res_data[i].add(col->get_data()[i]);
+                if (auto value = col->get_data()[i]; value >= 0) {
+                    res_data[i].add(value);
+                }
             }
         }
     }
diff --git a/regression-test/data/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.out b/regression-test/data/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.out
index d344ad27bf..ead150506e 100644
--- a/regression-test/data/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.out
+++ b/regression-test/data/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.out
@@ -406,7 +406,7 @@ true
 1
 
 -- !sql --
-
+0
 
 -- !sql --
 \N
diff --git a/regression-test/data/query_p0/sql_functions/bitmap_functions/test_bitmap_function.out b/regression-test/data/query_p0/sql_functions/bitmap_functions/test_bitmap_function.out
index 8afca0f983..1c3ae41446 100644
--- a/regression-test/data/query_p0/sql_functions/bitmap_functions/test_bitmap_function.out
+++ b/regression-test/data/query_p0/sql_functions/bitmap_functions/test_bitmap_function.out
@@ -415,7 +415,7 @@ true
 1
 
 -- !sql --
-
+0
 
 -- !sql --
 \N
diff --git a/regression-test/suites/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy b/regression-test/suites/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy
index f3d9515875..8e2f3fa0d8 100644
--- a/regression-test/suites/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy
+++ b/regression-test/suites/nereids_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy
@@ -571,7 +571,7 @@ suite("test_bitmap_function") {
 
     // TO_BITMAP
     qt_sql """ select bitmap_count(to_bitmap(10)) """
-    qt_sql """ select bitmap_to_string(to_bitmap("-1")) """
+    qt_sql """ select bitmap_count(to_bitmap("-1")) """
 
     // BITMAP_MAX
     qt_sql """ select bitmap_max(bitmap_from_string('')) value; """
diff --git a/regression-test/suites/query_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy b/regression-test/suites/query_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy
index 36e36d6762..e7e564ce90 100644
--- a/regression-test/suites/query_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy
+++ b/regression-test/suites/query_p0/sql_functions/bitmap_functions/test_bitmap_function.groovy
@@ -579,7 +579,7 @@ suite("test_bitmap_function") {
 
     // TO_BITMAP
     qt_sql """ select bitmap_count(to_bitmap(10)) """
-    qt_sql """ select bitmap_to_string(to_bitmap("-1")) """
+    qt_sql """ select bitmap_count(to_bitmap("-1")) """
 
     // BITMAP_MAX
     qt_sql """ select bitmap_max(bitmap_from_string('')) value; """