diff --git a/internal/nodes/http_request.go b/internal/nodes/http_request.go
index b856a1b..ea1624d 100644
--- a/internal/nodes/http_request.go
+++ b/internal/nodes/http_request.go
@@ -1557,7 +1557,7 @@ func (this *HTTPRequest) fixRequestHeader(header http.Header) {
 
 // 处理自定义Response Header
 func (this *HTTPRequest) processResponseHeaders(statusCode int) {
-	responseHeader := this.writer.Header()
+	var responseHeader = this.writer.Header()
 
 	// 删除/添加/替换Header
 	// TODO 实现AddTrailers
diff --git a/internal/nodes/http_request_cache.go b/internal/nodes/http_request_cache.go
index 957fbeb..a5ecd89 100644
--- a/internal/nodes/http_request_cache.go
+++ b/internal/nodes/http_request_cache.go
@@ -379,7 +379,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 支持 If-None-Match
-	if !isPartialCache && len(eTag) > 0 && this.requestHeader("If-None-Match") == eTag {
+	if !this.isLnRequest && !isPartialCache && len(eTag) > 0 && this.requestHeader("If-None-Match") == eTag {
 		// 自定义Header
 		this.processResponseHeaders(http.StatusNotModified)
 		this.writer.WriteHeader(http.StatusNotModified)
@@ -390,7 +390,7 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	}
 
 	// 支持 If-Modified-Since
-	if !isPartialCache && len(modifiedTime) > 0 && this.requestHeader("If-Modified-Since") == modifiedTime {
+	if !this.isLnRequest && !isPartialCache && len(modifiedTime) > 0 && this.requestHeader("If-Modified-Since") == modifiedTime {
 		// 自定义Header
 		this.processResponseHeaders(http.StatusNotModified)
 		this.writer.WriteHeader(http.StatusNotModified)
@@ -403,6 +403,11 @@ func (this *HTTPRequest) doCacheRead(useStale bool) (shouldStop bool) {
 	this.processResponseHeaders(reader.Status())
 	this.addExpiresHeader(reader.ExpiresAt())
 
+	// 返回上级节点过期时间
+	if this.isLnRequest {
+		respHeader.Set(LNExpiresHeader, types.String(reader.ExpiresAt()))
+	}
+
 	// 输出Body
 	if this.RawReq.Method == http.MethodHead {
 		this.writer.WriteHeader(reader.Status())
diff --git a/internal/nodes/http_request_ln.go b/internal/nodes/http_request_ln.go
index c1d5dfc..d6426d5 100644
--- a/internal/nodes/http_request_ln.go
+++ b/internal/nodes/http_request_ln.go
@@ -8,6 +8,10 @@ import (
 	"github.com/TeaOSLab/EdgeCommon/pkg/serverconfigs"
 )
 
+const (
+	LNExpiresHeader = "X-Edge-Ln-Expires"
+)
+
 func (this *HTTPRequest) checkLnRequest() bool {
 	return false
 }
diff --git a/internal/nodes/http_writer.go b/internal/nodes/http_writer.go
index dfa0d69..89cf81c 100644
--- a/internal/nodes/http_writer.go
+++ b/internal/nodes/http_writer.go
@@ -283,12 +283,28 @@ func (this *HTTPWriter) PrepareCache(resp *http.Response, size int64) {
 		}
 	}
 
-	var expiredAt = utils.UnixTime() + life
+	var expiresAt = utils.UnixTime() + life
+
+	if this.req.isLnRequest {
+		// 返回上级节点过期时间
+		this.SetHeader(LNExpiresHeader, []string{types.String(expiresAt)})
+	} else {
+		var expiresHeader = this.Header().Get(LNExpiresHeader)
+		if len(expiresHeader) > 0 {
+			this.Header().Del(LNExpiresHeader)
+
+			var expiresHeaderInt64 = types.Int64(expiresHeader)
+			if expiresHeaderInt64 > 0 {
+				expiresAt = expiresHeaderInt64
+			}
+		}
+	}
+
 	var cacheKey = this.req.cacheKey
 	if this.isPartial {
 		cacheKey += caches.SuffixPartial
 	}
-	cacheWriter, err := storage.OpenWriter(cacheKey, expiredAt, this.StatusCode(), size, cacheRef.MaxSizeBytes(), this.isPartial)
+	cacheWriter, err := storage.OpenWriter(cacheKey, expiresAt, this.StatusCode(), size, cacheRef.MaxSizeBytes(), this.isPartial)
 	if err != nil {
 		if err == caches.ErrEntityTooLarge && addStatusHeader {
 			this.Header().Set("X-Cache", "BYPASS, entity too large")
diff --git a/internal/nodes/http_writer_ext.go b/internal/nodes/http_writer_ext.go
index 5fcb93d..b5bbb0f 100644
--- a/internal/nodes/http_writer_ext.go
+++ b/internal/nodes/http_writer_ext.go
@@ -4,6 +4,10 @@
 
 package nodes
 
+import (
+	"os"
+)
+
 func (this *HTTPWriter) canSendfile() (*os.File, bool) {
 	return nil, false
 }