Anti-jamming methods should be applied to GPS receivers in certain situation due to the low power characteristic of GPS signal. Interference was mitigated by MUSIC algorithm applied to a uniform linear array in this paper, and a simulation on capturing GPS signal was also completed. The result shows that the MUSIC algorithm is competent for high precision DOA estimation of jammer and separating signals and noises with large J/N ratio. The anti-jamming performance of GPS receiver is improved when DOAs of GPS signals and interferences differ beyond a certain degree.