diff --git a/src/main.rs b/src/main.rs
index dd110cd..1f6fabc 100755
--- a/src/main.rs
+++ b/src/main.rs
@@ -188,7 +188,13 @@ async fn test_shreds() -> Result<(), Box<dyn std::error::Error>> {
 
 fn create_event_callback() -> impl Fn(Box<dyn UnifiedEvent>) {
     |event: Box<dyn UnifiedEvent>| {
-        println!("🎉 Event received! Type: {:?}, ID: {}", event.event_type(), event.id());
+        println!(
+            "🎉 Event received! Type: {:?}, ID: {}, Slot: {}, Transaction Index: {:?}",
+            event.event_type(),
+            event.id(),
+            event.slot(),
+            event.transaction_index(),
+        );
         match_event!(event, {
             // -------------------------- block meta -----------------------
             BlockMetaEvent => |e: BlockMetaEvent| {
diff --git a/src/streaming/common/event_processor.rs b/src/streaming/common/event_processor.rs
index e69d699..7bbacd2 100644
--- a/src/streaming/common/event_processor.rs
+++ b/src/streaming/common/event_processor.rs
@@ -113,7 +113,7 @@ impl EventProcessor {
                 let signature = transaction_pretty.signature;
                 // 使用缓存获取解析器
                 let parser = self.get_parser();
-                let all_events = parser
+                let mut all_events = parser
                     .parse_transaction(
                         transaction_pretty.tx.clone(),
                         signature,
@@ -125,6 +125,11 @@ impl EventProcessor {
                     .await
                     .unwrap_or_else(|_e| vec![]);
 
+                // 为所有事件设置交易索引
+                for event in &mut all_events {
+                    event.set_transaction_index(transaction_pretty.transaction_index);
+                }
+
                 let max_time_consuming_us = all_events
                     .iter()
                     .map(|event| event.program_handle_time_consuming_us())
diff --git a/src/streaming/event_parser/common/mod.rs b/src/streaming/event_parser/common/mod.rs
index d421559..3562a92 100755
--- a/src/streaming/event_parser/common/mod.rs
+++ b/src/streaming/event_parser/common/mod.rs
@@ -69,6 +69,14 @@ macro_rules! impl_unified_event {
             fn index(&self) -> String {
                 self.metadata.index.clone()
             }
+
+            fn transaction_index(&self) -> Option<u64> {
+                self.metadata.transaction_index
+            }
+
+            fn set_transaction_index(&mut self, transaction_index: Option<u64>) {
+                self.metadata.set_transaction_index(transaction_index);
+            }
         }
     };
 }
diff --git a/src/streaming/event_parser/common/types.rs b/src/streaming/event_parser/common/types.rs
index 37e75e4..e1ab15e 100755
--- a/src/streaming/event_parser/common/types.rs
+++ b/src/streaming/event_parser/common/types.rs
@@ -337,6 +337,7 @@ pub struct EventMetadata {
     pub id: String,
     pub signature: String,
     pub slot: u64,
+    pub transaction_index: Option<u64>,  // 新增：交易在slot中的索引
     pub block_time: i64,
     pub block_time_ms: i64,
     pub program_received_time_us: i64,
@@ -347,7 +348,7 @@ pub struct EventMetadata {
     #[deprecated(note = "Please use swap_data instead")]
     pub transfer_datas: Vec<TransferData>,
     pub swap_data: Option<SwapData>,
-    pub index: String,
+    pub index: String,  // 保留原有的指令索引
 }
 
 impl EventMetadata {
@@ -368,6 +369,7 @@ impl EventMetadata {
             id,
             signature,
             slot,
+            transaction_index: None,  // 默认为None，后续设置
             block_time,
             block_time_ms,
             program_received_time_us,
@@ -389,6 +391,11 @@ impl EventMetadata {
         self.swap_data = Some(swap_data);
     }
 
+    /// 设置交易索引
+    pub fn set_transaction_index(&mut self, transaction_index: Option<u64>) {
+        self.transaction_index = transaction_index;
+    }
+
     /// Recycle EventMetadata to object pool
     pub fn recycle(self) {
         EVENT_METADATA_POOL.release(self);
diff --git a/src/streaming/event_parser/core/traits.rs b/src/streaming/event_parser/core/traits.rs
index d29e52e..67d6af8 100755
--- a/src/streaming/event_parser/core/traits.rs
+++ b/src/streaming/event_parser/core/traits.rs
@@ -64,6 +64,12 @@ pub trait UnifiedEvent: Debug + Send + Sync {
 
     /// Get index
     fn index(&self) -> String;
+
+    /// Get transaction index in slot
+    fn transaction_index(&self) -> Option<u64>;
+
+    /// Set transaction index in slot
+    fn set_transaction_index(&mut self, transaction_index: Option<u64>);
 }
 
 /// 事件解析器trait - 定义了事件解析的核心方法
diff --git a/src/streaming/grpc/types.rs b/src/streaming/grpc/types.rs
index b0ef05f..9238f9f 100644
--- a/src/streaming/grpc/types.rs
+++ b/src/streaming/grpc/types.rs
@@ -69,6 +69,7 @@ impl fmt::Debug for BlockMetaPretty {
 #[derive(Clone)]
 pub struct TransactionPretty {
     pub slot: u64,
+    pub transaction_index: Option<u64>,  // 新增：交易在slot中的索引
     pub block_hash: String,
     pub block_time: Option<Timestamp>,
     pub signature: Signature,
@@ -81,6 +82,7 @@ impl fmt::Debug for TransactionPretty {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("TransactionPretty")
             .field("slot", &self.slot)
+            .field("transaction_index", &self.transaction_index)
             .field("signature", &self.signature)
             .field("is_vote", &self.is_vote)
             .field("program_received_time_us", &self.program_received_time_us)
@@ -132,8 +134,11 @@ impl From<(SubscribeUpdateTransaction, Option<Timestamp>)> for TransactionPretty
         ),
     ) -> Self {
         let tx = transaction.expect("should be defined");
+        // 根据用户说明，交易索引在 transaction.index 中
+        let transaction_index = tx.index;
         Self {
             slot,
+            transaction_index: Some(transaction_index),  // 提取交易索引
             block_time,
             block_hash: "".to_string(),
             signature: Signature::try_from(tx.signature.as_slice()).expect("valid signature"),