This paper firstly describes the format and features of heterogeneous protocol packet.Then it describes the extended protocol packets by using the XML language, and modularizes the parser function to design a model of dynamic heterogeneous protocol parser based on the method of simple protocol analysis.Realizations applying this model can be achieved without recompiling, and only a small amount of code changes is needed to complete the model automatic matching of heterogeneous protocol packets, and then complete the analysis of packet data.We apply the model into two simple protocols, and the results show that the method of using XML to describe the protocol message and the reconfigurable parser can describe and analyze the heterogeneous protocol message effectively, and obtain reliable analysis result.