Abstract: The number of sensor nodes in wireless sensor networks are numerous and single node is extraordinarily limited in resource. The first aim of designing routing data gathering protocol of wireless sensor networks is to reduce the overall energy dissipated in the network and to maximize the network lifetime. The author analyzed and compared several typical existing data gathering protocols, based on the actual application needs, design a new data gathering protocol—miscellaneous data gathering protocol based on node clustering in wireless sensor networks(MDGP). MDGP is a differentiated service data gathering protocol based on in-network data aggregation. It is suitable for mine large-scale security detection applications. In this paper, a new algorithm for cluster head election is proposed, which can balance the load and reduce the number of cluster head. The data aggregation tree, a multiple-source single-sink communication paradigm, is employed for abstracting the packet flow. A real-time scenario where the data gathering must be performed within a specified latency constraint is also considered. The simulation results show that MDGP provides longer lifetime than the current important protocol and achieves its design goal.