Abstract: The pseudo pilots searching algorithm has high complexity. Hence, a new MB LSF channel estimation algorithm based on pseudo pilot searching is proposed in this paper. The channel response of pilot positions is first estimated. And then, all the other channel responses are obtained by using linear interpolation. Thus, the detection of pseudo pilots is achieved, which is further used as the first search symbol. Both the theorical analysis and simulation results show that the proposed algorithm can largely decrease the research times of pseudo pilots without degrading the performance of channel estimation.