In order to solve the promblem in existing algorithms of the current WSN network terminal, that it is difficult to determine in the positioning process, and the accuracy level is low, and the positioning delay is difficult to meet actual application level, put forward an algorithm for determining the WSN network inference mechanism based on adaptive RF terminal. First of all through the communication performance of WSN network terminal research, adopts RF adaptive mechanism based on inference intensity information for all the network nodes performance sort inference, reduce the control problem in the process of positioning signal, and improve the robustness in the process of signal acquisition; then introducing the linear search fault mechanism, the differential mode for zero the positioning accuracy, greatly improves the positioning accuracy, reduce the error in the process of positioning. Simulation results show that compared with the current algorithm this algorithm is widely applicable positioning accuracy of collinear, has the advantages of high precision, coordinate error is small, short time delay positioning significant advantages, has good performance in practical application in the field of engineering.