Abstract: A new method with high accuracy for mobile multi-station passive location based on improved genetic algorithm is proposed. When the stable carrier exists in the measured signal of long distance fixed target emission, the positioning accuracy of the method can reach the level of the carrier wave length. The mathematical model of mobile multi-station observe long distance fixed target is set up. When the mobile multi-station steadily track the carrier of target, iterative solution of multi-station and multi-state carrier phase measurement is made by using the improved genetic algorithm, so that one can obtain location information with high precision. Theoretical and simulation results show that this method is a high precision mobile station passive location algorithm.