This article focuses on the topics of the quantum encryption method in wireless sensor networks. First, from the aspect of the nature separation and the secure, we studied the secure model. Second, the security of the quantum protocol was studied for Wireless Sensor Networks by three points that are the environment, privacy protection and the quantum system. Third, the security of the quantum communication protocol was analyzed by three sides, which are the side of the improved, the protocol matrix and the probabilisti. Four, the analysis results show that this method is so good for the wireless sensor networks.