Satellite communication signal capturing method and related device

The invention discloses a method for capturing a satellite communication signal and a related device, which can utilize a navigation signal as a guide signal and complete the capturing and tracking of the guide signal in a short time through a satellite communication chip so as to determine the millisecond boundary of the satellite communication signal. Furthermore, a time domain search range and/or a frequency domain search range of the satellite communication signal are/is determined through the satellite communication chip based on information such as millisecond boundary of the satellite communication signal, observed quantity information of the guide signal, predicted ephemeris information and the like, the satellite communication signal is quickly captured and tracked, and time consumed for capturing the satellite communication signal is reduced.