The invention belongs to the technical field of spread spectrum communication, and discloses a pseudo code capture and track system and a pseudo code capture and track method for a spread spectrum signal. The system comprises a data caching module, a capture correlator, a capture FFT judgment module, a real-time data update module, a track correlator, a track FFT judgment module, a capture pseudo code phase adjustment module, a capture pseudo code generation module, a track pseudo code phase adjustment module and a track pseudo code generation module; information codes of a transmitting end are corresponding to pseudo codes one by one, so that the phase of the pseudo code is accordant with that of the pseudo code modulated by the transmitted end at a receiving end, and during a pseudo code capture and track process, the phase of the local pseudo code of the receiving end keeps invariable; after the local pseudo code of the receiving end and the pseudo code of the input spread spectrum signal are synchronized, a value acquired by integral accumulation is larger than that acquired by using a traditional movable pseudo code capture method; therefore, the pseudo code capture and track capacity of the system is improved, demodulation after dispreading is also facilitated, and thus the spread spectrum signal detection and track capacity of the system is improved.