Abstract: The channel estimation algorithm is used to predict the impulse response in TD-SCDMA system, since the realization of joint detection and other technologies depend on the basis of an accurate estimation of channel identity. Steiner estimation algorithm has lower cost, but the accuracy is affected by the noise in the channel. In this paper, a threshold processing algorithm is proposed, which is based on Steiner algorithm. Simulation results from uplink show that its channel impulse responses are closer to that of ideal ones. The approach is advantageous to the improvement of the system output performance.