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In order to solve the problem that the carrier Doppler and PN code Doppler cannot be successfully captured in the environment of large dynamic and low SNR due to the high rate of wideband spread spectrum signal, a parallel architecture based acquisition method is proposed.This mryhod uses the parallel carrier NCO to generate the local carrier, and perform down conversion mixing with the received signal to compensate the carrier and pseudo code Doppler. Using the parallel pseudo code NCO to generate the local code for internal code sliding correlation and external code matching filtering. Using the secondary acquisition to further estimate the carrier Doppler and pseudo code phase. The simulation results show that under the carrier noise ratio of 62 dBHz, when the symbol rate is 1Mbps, the carrier Doppler search range is ± 800 kHz, and the carrier Doppler change rate is ± 100 kHz/s, this method can achieve broadband spread spectrum signal acquisition. When the symbol signal noise ratio is 2 dB, the acquisition probability is 99%, and the acquisition time is 0.9009 s. The acquisition method can reduce the acquisition complexity of wideband spread spectrum signal and improve the acquisition efficiency, providing an effective acquisition method for wideband spread spectrum signal acquisition in large dynamic and low SNR environment.