diff --git a/code/rest/dav_service.go b/code/rest/dav_service.go
index 26ecf9b..f207273 100644
--- a/code/rest/dav_service.go
+++ b/code/rest/dav_service.go
@@ -7,6 +7,7 @@ import (
 	"github.com/eyebluecn/tank/code/tool/dav/xml"
 	"github.com/eyebluecn/tank/code/tool/result"
 	"github.com/eyebluecn/tank/code/tool/util"
+	"github.com/eyebluecn/tank/code/tool/webdav"
 	"io/ioutil"
 	"net/http"
 	"net/url"
@@ -196,6 +197,54 @@ func (this *DavService) HandlePropfind(writer http.ResponseWriter, request *http
 
 }
 
+//change the file's property
+func (this *DavService) HandleProppatch(writer http.ResponseWriter, request *http.Request, user *User, subPath string) {
+
+	fmt.Printf("PROPPATCH %s\n", subPath)
+
+	matter := this.matterDao.checkByUserUuidAndPath(user.Uuid, subPath)
+
+	patches, status, err := webdav.ReadProppatch(request.Body)
+	this.PanicError(err)
+
+	fmt.Println("status:%v", status)
+
+	//prepare a multiStatusWriter.
+	multiStatusWriter := &dav.MultiStatusWriter{Writer: writer}
+
+	propstats := make([]dav.Propstat, 0)
+	propMap := matter.FetchPropMap()
+	for _, patch := range patches {
+		propStat := dav.Propstat{Status: http.StatusOK}
+		if patch.Remove {
+
+		} else {
+			for _, prop := range patch.Props {
+				propMap[prop.XMLName.Local] = string(prop.InnerXML)
+
+				propStat.Props = append(propStat.Props, dav.Property{XMLName: xml.Name{Space: prop.XMLName.Space, Local: prop.XMLName.Local}})
+
+			}
+		}
+
+		propstats = append(propstats, propStat)
+
+	}
+	matter.SetPropMap(propMap)
+	// update the matter
+	this.matterDao.Save(matter)
+
+	visitPath := fmt.Sprintf("%s%s", WEBDAV_PREFIX, matter.Path)
+	response := this.makePropstatResponse(visitPath, propstats)
+
+	err1 := multiStatusWriter.Write(response)
+	this.PanicError(err1)
+
+	err2 := multiStatusWriter.Close()
+	this.PanicError(err2)
+
+}
+
 //handle download
 func (this *DavService) HandleGetHeadPost(writer http.ResponseWriter, request *http.Request, user *User, subPath string) {
 
@@ -454,12 +503,6 @@ func (this *DavService) HandleUnlock(writer http.ResponseWriter, request *http.R
 	panic(result.BadRequest("not support UNLOCK yet."))
 }
 
-//change the file's property
-func (this *DavService) HandleProppatch(writer http.ResponseWriter, request *http.Request, user *User, subPath string) {
-
-	panic(result.BadRequest("not support PROPPATCH yet."))
-}
-
 //hanle all the request.
 func (this *DavService) HandleDav(writer http.ResponseWriter, request *http.Request, user *User, subPath string) {
 
diff --git a/code/rest/matter_model.go b/code/rest/matter_model.go
index 9cddc19..9bc5ffb 100644
--- a/code/rest/matter_model.go
+++ b/code/rest/matter_model.go
@@ -6,6 +6,7 @@ import (
 	"github.com/eyebluecn/tank/code/tool/i18n"
 	"github.com/eyebluecn/tank/code/tool/result"
 	"github.com/eyebluecn/tank/code/tool/util"
+	jsoniter "github.com/json-iterator/go"
 	"net/http"
 	"regexp"
 	"strings"
@@ -114,3 +115,31 @@ func CheckMatterName(request *http.Request, name string) string {
 	}
 	return name
 }
+
+//fetch the props
+func (this *Matter) FetchPropMap() map[string]string {
+
+	m := make(map[string]string)
+	json := this.Prop
+	if json == "" {
+		json = EMPTY_JSON_MAP
+	}
+
+	err := jsoniter.ConfigCompatibleWithStandardLibrary.Unmarshal([]byte(json), &m)
+	if err != nil {
+		panic(err)
+	}
+
+	return m
+}
+
+//fetch the props
+func (this *Matter) SetPropMap(propMap map[string]string) {
+
+	b, err := jsoniter.ConfigCompatibleWithStandardLibrary.Marshal(propMap)
+	if err != nil {
+		panic(err)
+	}
+
+	this.Prop = string(b)
+}
diff --git a/code/tool/webdav/webdav.go b/code/tool/webdav/webdav.go
index ea11636..5162df0 100644
--- a/code/tool/webdav/webdav.go
+++ b/code/tool/webdav/webdav.go
@@ -593,7 +593,7 @@ func (h *Handler) handleProppatch(w http.ResponseWriter, r *http.Request) (statu
 		}
 		return http.StatusMethodNotAllowed, err
 	}
-	patches, status, err := readProppatch(r.Body)
+	patches, status, err := ReadProppatch(r.Body)
 	if err != nil {
 		return status, err
 	}
diff --git a/code/tool/webdav/xml.go b/code/tool/webdav/xml.go
index 1a856bc..bb6ae48 100644
--- a/code/tool/webdav/xml.go
+++ b/code/tool/webdav/xml.go
@@ -493,7 +493,7 @@ type propertyupdate struct {
 	SetRemove []setRemove `xml:",any"`
 }
 
-func readProppatch(r io.Reader) (patches []Proppatch, status int, err error) {
+func ReadProppatch(r io.Reader) (patches []Proppatch, status int, err error) {
 	var pu propertyupdate
 	if err = ixml.NewDecoder(r).Decode(&pu); err != nil {
 		return nil, http.StatusBadRequest, err
diff --git a/code/tool/webdav/xml_test.go b/code/tool/webdav/xml_test.go
index 804cc2a..783c069 100644
--- a/code/tool/webdav/xml_test.go
+++ b/code/tool/webdav/xml_test.go
@@ -705,7 +705,7 @@ func TestReadProppatch(t *testing.T) {
 	}}
 
 	for _, tc := range testCases {
-		pp, status, err := readProppatch(strings.NewReader(tc.input))
+		pp, status, err := ReadProppatch(strings.NewReader(tc.input))
 		if tc.wantStatus != 0 {
 			if err == nil {
 				t.Errorf("%s: got nil error, want non-nil", tc.desc)