Binary Offset Carrier (BOC) modulation is a type of new modulation method, which realizes the split of spectrumto make full use of the available frequency bands, and has important application value and development prospect. The signalcharacteristic of BOC(10,5) is analyzed in detail, the power spectral density function and correlation function is analyzed andstimulated. A segmented interative fast acquisition algorithm based on Fast Fourier Transform (FFT) is proposed, aiming to improveaccuracy of fast signal acquisition. The simulation and experimental results are given to demonstrate that the software receiver canperform BOC(10,5) modulation signal acquisition successfully, which can provide a good technical support for navigation signalprocessing algorithm research and navigation receiver development.