Abstract: Among the traditional frequency hopping synchronization acquisition methods, the serial acquisition method takes a long time to acquire, and the parallel acquisition method has a high system complexity, and the use of the synchronization pilot code is susceptible to interference. In order to solve these problems, an acquisition strategy based on subsequence search is proposed to represent the time information by frequency hopping sequence itself.An implementation of this strategy is a synchronous acquisition scheme based on partial frequency point matching of the sequence. The scheme uses a system structure similar to the parallel acquisition method. Through the multi-branch detection method, a short subsequence of the frequency hopping sequence is obtained. The subsequence is searched and matched in the local frequency hopping sequence of the receiving end, and then the position of the currently received signal in the sequence is obtained. This paper studies the strategy and optimizes the frequency point search strategy in the acquisition process: actively instead of passively changes the frequency group used by the receiver for detection. This increases the probability of detection success and speeds up the subsequences obtaining. Meanwhile, a multi-channel parallel scheme is used for simultaneous synchronization confirmation and digital detection, which accelerates the next capture after the current capture fails. Theoretical analysis and simulation results show that the acquisition probability has been greatly improved compared to the scheme based on sequence partial frequency matching.On the premise of the same performance, the system complexity is significantly reducedcompared to traditional parallel acquisition method and the scheme based on sequence partial frequency matching.