diff --git a/modules/ngx_http_xquic_module/ngx_http_v3_stream.c b/modules/ngx_http_xquic_module/ngx_http_v3_stream.c
index 89c01b8dfd..2d631edaef 100644
--- a/modules/ngx_http_xquic_module/ngx_http_v3_stream.c
+++ b/modules/ngx_http_xquic_module/ngx_http_v3_stream.c
@@ -20,6 +20,7 @@ static void ngx_http_v3_run_request(ngx_http_request_t *r, ngx_http_v3_stream_t
 static void ngx_http_v3_stream_free(ngx_http_v3_stream_t *h3_stream);
 void ngx_http_v3_stream_cancel(ngx_http_v3_stream_t *h3_stream,
     ngx_int_t status);
+static void ngx_http_v3_upstream_write_and_recv_body_handler(ngx_event_t *rev);
 
 
 static void
@@ -845,6 +846,43 @@ ngx_http_v3_init_request_body(ngx_http_request_t *r)
 }
 
 
+static void
+ngx_http_v3_upstream_write_and_recv_body_handler(ngx_event_t *ev)
+{
+    ngx_http_request_t         *r;
+    ngx_http_v3_stream_t      *stream; 
+    xqc_h3_request_t          *h3_request;
+    ngx_http_upstream_t       *u;
+    ngx_connection_t          *fc;
+
+    stream = ev->data;
+    r = stream->request;
+    fc = r->connection;
+    u = r->upstream;
+    h3_request = stream->h3_request;
+
+
+    ngx_http_set_log_request(fc->log, r);
+
+    ngx_log_debug2(NGX_LOG_DEBUG_HTTP, fc->log, 0,
+                   "http upstream request: \"%V?%V\"", &r->uri, &r->args);
+
+    if (ev->delayed && ev->timedout) {
+        ev->delayed = 0;
+        ev->timedout = 0;
+    }
+
+    u->write_event_handler(r, u);
+    ngx_http_run_posted_requests(fc);
+
+    if (ngx_http_v3_recv_body(r, stream, h3_request) != NGX_OK) {
+        ngx_log_error(NGX_LOG_WARN, ngx_cycle->log, 0,
+                        "|xquic|ngx_http_v3_upstream_write_and_recv_body_handler error| ngx_http_v3_recv_body error");
+    }
+
+}
+
+
 ngx_int_t
 ngx_http_v3_recv_body(ngx_http_request_t         *r, 
     ngx_http_v3_stream_t      *stream, 
@@ -853,11 +891,15 @@ ngx_http_v3_recv_body(ngx_http_request_t         *r,
     ngx_http_core_loc_conf_t  *clcf;
     ngx_buf_t                 *buf;
     ngx_int_t                  rc;
-    ngx_connection_t          *fc;
+    ngx_connection_t          *fc, *c, *pc;
+    ngx_http_upstream_t       *u;
     off_t                      len;
 
     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
     fc = r->connection;
+    c = stream->connection->connection;
+    u = r->upstream;
+    pc = u->peer.connection;
 
     /* check if skip data */
     if (stream->skip_data) {
@@ -893,31 +935,65 @@ ngx_http_v3_recv_body(ngx_http_request_t         *r,
 
     ssize_t size = 0;
     uint8_t fin = 0;
+    ssize_t wait_write = 0;
 
     do {
         if (buf->last == buf->end) {
-            len = buf->end - buf->start;
-            off_t pos_len = buf->pos - buf->start;
 
-            u_char *new_buf = ngx_pcalloc(r->pool, len * 2);
-            if (new_buf == NULL) {
-                ngx_log_error(NGX_LOG_WARN, fc->log, 0,
-                              "|xquic|ngx_http_v3_recv_body|ngx_pcalloc error|");
+            if (r->request_body_no_buffering) {
 
-                return NGX_ERROR;
-            }
+                if (!pc) {
+                    ngx_log_error(NGX_LOG_WARN, fc->log, 0,
+                          "|xquic|ngx_http_v3_recv_body|the peer connection to upstream has been closed");
+                    return NGX_ERROR;
+                }
 
-            ngx_memcpy(new_buf, buf->start, len);
-            buf->pos = new_buf + pos_len;
-            buf->last = new_buf + len;
-            buf->end = new_buf + len * 2;
-            ngx_pfree(r->pool, buf->start);
-            buf->start = new_buf;
+                if (ngx_handle_write_event(pc->write, u->conf->send_lowat) != NGX_OK) {
+                        return NGX_ERROR;
+                }
+
+                if (u->request_sent) {
+                    if (pc->write->ready) {
+                        pc->write->handler(pc->write);
+                    }
+                    if (!wait_write) {
+                        wait_write = 1;
+                        continue;
+                    }
+
+                    if (!c) {
+                        ngx_log_error(NGX_LOG_WARN, fc->log, 0,
+                            "|xquic|ngx_http_v3_recv_body|the connection to client has been closed");
+                        return NGX_ERROR;
+                    }
+                    
+                    pc->write->ready = 1;
+                    pc->write->data = stream;
+                    // pc->write->saved_handler = pc->write->handler;
+                    pc->write->handler = ngx_http_v3_upstream_write_and_recv_body_handler;
+                    c->read->active = 0;
+
+                    return NGX_OK;
+                }
+
+                return NGX_OK;
+            }
+            return NGX_ERROR;
         }
 
         ngx_log_error(NGX_LOG_DEBUG, fc->log, 0,
                       "|xquic|ngx_http_v3_recv_body|buf->size:%z|", buf->end - buf->last);
 
+        if (c && c->read->active == 0) {
+            c->read->active = 1;
+            c->read->ready = 0;
+            c->read->data = c;
+            c->read->handler = ngx_http_xquic_read_handler;
+        }
+
+        clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
+        ngx_add_timer(fc->read, clcf->client_body_timeout);
+
         size = xqc_h3_request_recv_body(h3_request, buf->last, buf->end - buf->last, &fin);
         if (size == -XQC_EAGAIN) {
             break;
diff --git a/modules/ngx_http_xquic_module/ngx_http_xquic.c b/modules/ngx_http_xquic_module/ngx_http_xquic.c
index 33bbf8415f..80d559ae50 100644
--- a/modules/ngx_http_xquic_module/ngx_http_xquic.c
+++ b/modules/ngx_http_xquic_module/ngx_http_xquic.c
@@ -634,7 +634,7 @@ ngx_http_v3_filter_request_body(ngx_http_request_t *r)
     ngx_log_error(NGX_LOG_DEBUG, fc->log, 0,
                   "|xquic|ngx_http_v3_filter_request_body|size:%O, fin:%O|", buf->last - buf->pos, fin);
 
-    if (buf->pos == buf->last && rb->rest) {
+    if (buf->pos == buf->last && (rb->rest || rb->last_sent)) {
         cl = NULL;
         goto update;
     }
@@ -682,9 +682,10 @@ ngx_http_v3_filter_request_body(ngx_http_request_t *r)
         b->last = buf->last;
         b->start = b->pos;
         b->end = b->last;
+
+        buf->pos = buf->last;
     }
 
-    buf->pos = buf->last = buf->start;
     ngx_log_error(NGX_LOG_DEBUG, fc->log, 0,
                   "|xquic|ngx_http_v3_filter_request_body|received:%O|", rb->received);
 
@@ -701,6 +702,7 @@ ngx_http_v3_filter_request_body(ngx_http_request_t *r)
         }
 
         b->last_buf = 1;
+        rb->last_sent = 1;
     }
 
     b->tag = (ngx_buf_tag_t) &ngx_http_v3_filter_request_body;
@@ -979,7 +981,7 @@ ngx_http_xquic_session_process_packet(ngx_http_xquic_connection_t *qc,
 /**
  * used to recv udp packets
  */
-static void
+void
 ngx_http_xquic_read_handler(ngx_event_t *rev)
 {
     ssize_t                        n;
diff --git a/modules/ngx_http_xquic_module/ngx_http_xquic.h b/modules/ngx_http_xquic_module/ngx_http_xquic.h
index c710ced252..d59e1454fa 100644
--- a/modules/ngx_http_xquic_module/ngx_http_xquic.h
+++ b/modules/ngx_http_xquic_module/ngx_http_xquic.h
@@ -177,6 +177,7 @@ void ngx_http_v3_read_client_request_body_handler(ngx_http_request_t *r);
 xqc_int_t ngx_http_v3_cert_cb(const char *sni, void **chain,
     void **cert, void **key, void *conn_user_data);
 
+void ngx_http_xquic_read_handler(ngx_event_t *rev);
 
 #endif /* _NGX_HTTP_XQUIC_H_INCLUDED_ */
 
diff --git a/src/http/modules/ngx_http_upstream_keepalive_module.c b/src/http/modules/ngx_http_upstream_keepalive_module.c
index 1a4dfd7766..119b5055cc 100644
--- a/src/http/modules/ngx_http_upstream_keepalive_module.c
+++ b/src/http/modules/ngx_http_upstream_keepalive_module.c
@@ -289,6 +289,9 @@ ngx_http_upstream_get_keepalive_peer(ngx_peer_connection_t *pc, void *data)
     c->read->log = pc->log;
     c->write->log = pc->log;
     c->pool->log = pc->log;
+#if (T_NGX_XQUIC)
+    c->write->data = c;
+#endif
 
     if (c->read->timer_set) {
         ngx_del_timer(c->read);