Based on the GPS P code extended replication overlap (XFAST) acquisition algorithm and the mean acquisition algorithm, a time-frequency fusion algorithm based on time-frequency fusion is proposed. Through the XFAST processing of the local sequence, the search is expanded without affecting the correlation. The mean local processing of the processed local and received sequences is equivalent to the number of related symbols after reduction, that is, the amount of computation is reduced, so as to achieve the purpose of improving the capture speed. In this paper, the feasibility of the algorithm is analyzed, and the specific process of the algorithm is given. The simulation results verify the effectiveness of the proposed method.