Abstract: To improve the quality of the reconstructed picture in video communication，a new temporal error concealment algorithm for H.264 based on multi-mode overlapping is proposed.In this new method，the corrupted MB is concealed four times，each with different mode.And the weighted superposition of the four concealing MBs is the final replacement of the corrupted MB.Simulation results show that，for different test sequence and packet loss rate，the new method outperforms the traditional overlapping algorithm，greatly enhances the performance of the concealment.