diff --git a/shared/src/shared_builder.rs b/shared/src/shared_builder.rs
index 72b0ce3343a..d547bb82617 100644
--- a/shared/src/shared_builder.rs
+++ b/shared/src/shared_builder.rs
@@ -446,10 +446,25 @@ impl SharedBuilder {
         let block_status_map = Arc::new(DashMap::new());
 
         let assume_valid_targets = Arc::new(Mutex::new({
-            if Self::check_assume_valid_target_already_exists(&sync_config, &snapshot) {
+            let not_exists_targets: Option<Vec<H256>> =
+                sync_config.assume_valid_targets.map(|targets| {
+                    targets
+                        .iter()
+                        .filter(|&target_hash| {
+                            let exists = snapshot.block_exists(target_hash);
+                            if exists {
+                                info!("assume valid target 0x{} already exists in db", target_hash);
+                            }
+                            exists
+                        })
+                        .collect::<Vec<H256>>()
+                });
+
+            if not_exists_targets.is_some_and(|targets| targets.is_empty()) {
+                info!("all assume valid targets is already in db, CKB will do full verification from now on");
                 None
             } else {
-                sync_config.assume_valid_targets.clone()
+                not_exists_targets
             }
         }));