A wireless communication network strategy and charging implementing function node positioning method. The method is applied in the PCRF and P-GW wireless communication network containing the 3GPP evolved packet system, the main PCEF node containing partial strategy and charging implementing function exists in the P-GW, and the main PCEF node is connected with the slave PCEF node in the other network element device containing the other part of strategy and charging implementing function through the network, when the P-GW receives the message provided by the first strategy and charging rule transmitted by the PCRF and used to perform bearing strategy and charging control to the mobile terminal service, the IP address of the slave PCEF node is acquired, and the IP address is contained in thefirst strategy and charging rule responding message and transmitted to the PCRF. The adoption of the method of the invention can position the second PCEF node conveniently and accurately when the newservice is established for the mobile terminal and when the bearing strategy and charging control is performed to the existing service.