For sensing nodes not to be captured in unreliable environment, put forward a range-independent algorithm to solve node location problem, that is received signal strength indication (RSSI) security location algorithm. Through estimating anchor node environment parameters, use weighted minimum equal partition method to calculate the unknown node positions, improve the position calculation process robust and anti-attack defense ability. The method allows sensors to passively determine their location with high reliability, without increasing the number of reference points, or the complexity of the hardware of each reference point or node. At the same time, in the joint and non-joint attack modes, analyze the algorithm security location performances under different attack modes. The simulation result shows that the algorithm can get lower average location error, meanwhile reduces attacks influence have little side effects to location performance