The GPS signal fast acquisition is a key technology for high dynamic GPS receiver. Under the high dynamic conditions, the high-speed movement between GPS satellites and carriers generates a large Doppler shift, at the same time, the search point's increase. All of these make it is difficult to capture GPS signal fast. Based on the analysis of traditional acquisition methods, a fast acquisition method aided by inertial information was proposed. The result shows that inertial information aiding can obviously reduce acquisition time and increase the performance of GPS receiver.