Abstract:  With the development of satellite navigation signals, BOC modulation signals are widely used, however, according to the latest researches, BOC signals have faced new challenges in the synchronization acquisition.Considering the drawbacks of existing methods in side peaks suppression, researching the characters of BOC (2n,n) and putting forward CCFR(Crosscorrelation Function Reconstruction) base on the connection of multichannel correlation function. Through theoretical study and simulation, CCFR algorithm can eliminate the first side peaks and may inhibit other subpeak times. In addition, the performance of side peaks suppression is superior to existing algorithms.