In　order　to　study　the　influence　of　packet　loss　on　the　users＇　quality　of　experience　QoE　and　establish　the　Mapping　model　of　the　two　when　the　video　transmit　in　the　network,　building　a　NS2　+　MyEvalvid　simulation　platform,　by　the　method　of　modifying　QoS　parameters　to　simulate　different　degrees　of　packet　loss,　focus　on　the　influence　of　packet　loss　on　QoE　and　establish　the　mapping　model　between　them.　Experimental　results　show　that,　packet　loss　has　a　significant　influence　on　Quality　of　experience.　Packet　loss　rate　and　the　Quality　of　experience　presents　a　nonlinear　relationship,　and　use　Matlab　to　establish　the　mapping　model,　this　model＇s　accuracy　is　high,　easy　to　operate,　can　real-time　detect　packet　loss　has　influence　on　the　user＇s　quality　of　experience　(QoE).