diff --git a/chain/src/chain.rs b/chain/src/chain.rs
index aec614756f6..1c94d85ef35 100644
--- a/chain/src/chain.rs
+++ b/chain/src/chain.rs
@@ -1,6 +1,7 @@
 //! CKB chain service.
 #![allow(missing_docs)]
 
+use crate::orphan_block_pool::OrphanBlockPool;
 use ckb_channel::{self as channel, select, Receiver, Sender};
 use ckb_error::{Error, InternalErrorKind};
 use ckb_logger::Level::Trace;
@@ -11,7 +12,7 @@ use ckb_merkle_mountain_range::leaf_index_to_mmr_size;
 use ckb_proposal_table::ProposalTable;
 #[cfg(debug_assertions)]
 use ckb_rust_unstable_port::IsSorted;
-use ckb_shared::{shared::Shared, OrphanBlockPool};
+use ckb_shared::shared::Shared;
 use ckb_stop_handler::{SignalSender, StopHandler};
 use ckb_store::{attach_block_cell, detach_block_cell, ChainStore, StoreTransaction};
 use ckb_systemtime::unix_time_as_millis;
@@ -39,6 +40,8 @@ use std::sync::Arc;
 use std::time::Duration;
 use std::{cmp, thread};
 
+const ORPHAN_BLOCK_SIZE: usize = 100000;
+
 type ProcessBlockRequest = Request<(Arc<BlockView>, Switch), Result<bool, Error>>;
 type TruncateRequest = Request<Byte32, Result<(), Error>>;
 
@@ -54,6 +57,8 @@ pub struct ChainController {
     truncate_sender: Sender<TruncateRequest>,
     // Used for testing only
     stop: Option<StopHandler<()>>,
+
+    orphan_block_broker: Arc<OrphanBlockPool>,
 }
 
 impl Drop for ChainController {
@@ -68,11 +73,13 @@ impl ChainController {
         process_block_sender: Sender<ProcessBlockRequest>,
         truncate_sender: Sender<TruncateRequest>,
         stop: StopHandler<()>,
+        orphan_block_broker: Arc<OrphanBlockPool>,
     ) -> Self {
         ChainController {
             process_block_sender,
             truncate_sender,
             stop: Some(stop),
+            orphan_block_broker,
         }
     }
     /// Inserts the block into database.
@@ -125,8 +132,14 @@ impl ChainController {
             stop: None,
             truncate_sender: self.truncate_sender.clone(),
             process_block_sender: self.process_block_sender.clone(),
+            orphan_block_broker: self.orphan_block_broker.clone(),
         }
     }
+
+    // Relay need this
+    pub fn get_orphan_block(&self, hash: &Byte32) -> Option<BlockView> {
+        todo!("load orphan block")
+    }
 }
 
 /// The struct represent fork
@@ -208,6 +221,8 @@ pub struct ChainService {
     shared: Shared,
     proposal_table: Arc<Mutex<ProposalTable>>,
 
+    orphan_blocks_broker: Arc<OrphanBlockPool>,
+
     unverified_queue: Arc<crossbeam::queue::SegQueue<(Byte32, Switch)>>,
 }
 
@@ -220,13 +235,10 @@ impl ChainService {
             shared,
             proposal_table: Arc::new(Mutex::new(proposal_table)),
             unverified_queue,
+            orphan_blocks_broker: Arc::new(OrphanBlockPool::with_capacity(ORPHAN_BLOCK_SIZE)),
         }
     }
 
-    fn orphan_blocks_broker(&self) -> Arc<OrphanBlockPool> {
-        self.shared.orphan_block_pool()
-    }
-
     /// start background single-threaded service with specified thread_name.
     pub fn start<S: ToString>(mut self, thread_name: Option<S>) -> ChainController {
         let (signal_sender, signal_receiver) = channel::bounded::<()>(SIGNAL_CHANNEL_SIZE);
@@ -240,6 +252,7 @@ impl ChainService {
         }
         let tx_control = self.shared.tx_pool_controller().clone();
         let (unverified_queue_stop_tx, unverified_queue_stop_rx) = ckb_channel::bounded::<()>(1);
+        let orphan_blocks_broker_clone = Arc::clone(&self.orphan_blocks_broker);
 
         let thread = thread_builder
             .spawn({
@@ -293,7 +306,12 @@ impl ChainService {
             "chain".to_string(),
         );
 
-        ChainController::new(process_block_sender, truncate_sender, stop)
+        ChainController::new(
+            process_block_sender,
+            truncate_sender,
+            stop,
+            orphan_blocks_broker_clone,
+        )
     }
 
     fn consume_unverified_blocks(&self, unverified_queue_stop_rx: Receiver<()>) {
@@ -465,23 +483,22 @@ impl ChainService {
         db_txn.insert_block(block.as_ref())?;
         db_txn.commit()?;
 
-        self.orphan_blocks_broker()
-            .insert(block.as_ref().to_owned());
+        self.orphan_blocks_broker.insert(block.as_ref().to_owned());
         {
             debug!(
                 "there are {} orphan blocks in orphan_blocks_broker",
-                self.orphan_blocks_broker().len()
+                self.orphan_blocks_broker.len()
             );
         }
 
-        for leader_hash in self.orphan_blocks_broker().clone_leaders() {
+        for leader_hash in self.orphan_blocks_broker.clone_leaders() {
             if !db_txn.get_block_epoch_index(&leader_hash).is_some() {
                 trace!("a orphan leader: {} not stored", leader_hash);
                 continue;
             }
 
             for descendant in self
-                .orphan_blocks_broker()
+                .orphan_blocks_broker
                 .remove_blocks_by_parent(&leader_hash)
             {
                 match self.accept_block(descendant.hash()) {
diff --git a/chain/src/lib.rs b/chain/src/lib.rs
index 5898633b834..2def5177fc8 100644
--- a/chain/src/lib.rs
+++ b/chain/src/lib.rs
@@ -7,5 +7,6 @@
 //! [`ChainController`]: chain/struct.ChainController.html
 
 pub mod chain;
+mod orphan_block_pool;
 #[cfg(test)]
 mod tests;
diff --git a/shared/src/orphan_block_pool.rs b/chain/src/orphan_block_pool.rs
similarity index 100%
rename from shared/src/orphan_block_pool.rs
rename to chain/src/orphan_block_pool.rs
diff --git a/shared/src/lib.rs b/shared/src/lib.rs
index 699b1f81548..c9d0791610c 100644
--- a/shared/src/lib.rs
+++ b/shared/src/lib.rs
@@ -2,12 +2,10 @@
 
 // num_cpus is used in proc_macro
 mod block_status;
-mod orphan_block_pool;
 pub mod shared;
 mod types;
 
 pub use block_status::BlockStatus;
 pub use ckb_snapshot::{Snapshot, SnapshotMgr};
-pub use orphan_block_pool::{OrphanBlockPool, ParentHash};
 pub use shared::Shared;
 pub use types::{HeaderMap, HeaderView};
diff --git a/shared/src/shared.rs b/shared/src/shared.rs
index 89d25300ddd..f4c7ee31315 100644
--- a/shared/src/shared.rs
+++ b/shared/src/shared.rs
@@ -1,7 +1,7 @@
 //! TODO(doc): @quake
 use crate::block_status::BlockStatus;
 use crate::types::HeaderMap;
-use crate::{OrphanBlockPool, Snapshot, SnapshotMgr};
+use crate::{Snapshot, SnapshotMgr};
 use arc_swap::Guard;
 use ckb_async_runtime::Handle;
 use ckb_chain_spec::consensus::Consensus;
@@ -37,7 +37,6 @@ const FREEZER_INTERVAL: Duration = Duration::from_secs(60);
 const THRESHOLD_EPOCH: EpochNumber = 2;
 const MAX_FREEZE_LIMIT: BlockNumber = 30_000;
 const SHRINK_THRESHOLD: usize = 300;
-const ORPHAN_BLOCK_SIZE: usize = 100000;
 
 /// An owned permission to close on a freezer thread
 pub struct FreezerClose {
@@ -67,7 +66,6 @@ pub struct Shared {
     pub(crate) header_map: Arc<HeaderMap>,
     pub(crate) block_status_map: DashMap<Byte32, BlockStatus>,
     pub(crate) unverified_tip: Arc<Mutex<HeaderView>>,
-    pub(crate) orphan_block_pool: Arc<OrphanBlockPool>,
 }
 
 impl Shared {
@@ -100,7 +98,6 @@ impl Shared {
             header_map: Arc::new(header_map),
             block_status_map: DashMap::new(),
             unverified_tip: Arc::new(Mutex::new(unverified_tip)),
-            orphan_block_pool: Arc::new(OrphanBlockPool::with_capacity(ORPHAN_BLOCK_SIZE)),
         }
     }
     /// Spawn freeze background thread that periodically checks and moves ancient data from the kv database into the freezer.
@@ -457,13 +454,4 @@ impl Shared {
     pub fn remove_header_view(&self, hash: &Byte32) {
         self.header_map().remove(hash);
     }
-
-    pub fn orphan_block_pool(&self) -> Arc<OrphanBlockPool> {
-        Arc::clone(&self.orphan_block_pool)
-    }
-
-    pub fn get_orphan_block(&self, block_hash: &Byte32) -> Option<BlockView> {
-        todo!("// TODO move orphan blocks from ckb_chain to ckb_shared");
-        self.orphan_block_pool.get_block(block_hash)
-    }
 }
diff --git a/sync/src/relayer/mod.rs b/sync/src/relayer/mod.rs
index ad9a5455d51..16b2bddb185 100644
--- a/sync/src/relayer/mod.rs
+++ b/sync/src/relayer/mod.rs
@@ -458,7 +458,7 @@ impl Relayer {
                     }
                 }
                 BlockStatus::BLOCK_RECEIVED => {
-                    if let Some(uncle) = self.shared.shared().get_orphan_block(&uncle_hash) {
+                    if let Some(uncle) = self.chain.get_orphan_block(&uncle_hash) {
                         uncles.push(uncle.as_uncle().data());
                     } else {
                         debug_target!(