Multi-path error is one of the main error sources of GPS positioning. The current multi-path mitigation technology based on adaptive antenna array is suitable for single source and the position of direct signal and of multi-path signal that are given. A new multi-path mitigation technology combines the direction estimation in coherent environment and multi-beam forming anti-jamming method. First, the positions of direct signal and multi-path signals of GPS satellite were estimated based on CDEML, and MCMVB was used to obtain big gain of the direction of direct signal while restrain multi-path signals effectively. The computer simulation confirms the availability of the algorithm.