Abstract: Cyclic prefix is a copy of the last samples of OFDM symbol. The OFDM synchronization estimation algorithm based on cyclic prefix has low complexity and can save the bandwidth resource of the OFDM systems, so the synchronization method proposed in this study is based on cyclic prefix. Novel symbol timing metric is presented in the proposed method and the timing metric has a peak plateau. The proposed method does not need to seek for the peak value of the timing metric to realize the synchronization estimation. It just needs to find the edge of the peak plateau. In the proposed method we need to set a threshold to process symbol timing metric, after which it is easy to find the edge of the peak plateau, so the proposed method has low complexity. The simulation results show that the proposed method has low mean error and MSE.