The invention discloses a method for inertial information assisting a GNSS tracking loop. The method includes the steps that according to the carrier position, speed and accelerated speed information provided by an inertial navigation system, combined with the information such as local time and a satellite ephemeris, Doppler shifts and Doppler shift change rates of all channel satellites of a GNSS receiver are calculated in real time, the difference information of a tracking loop carrier frequency shift measurement value and a corresponding Doppler shift calculation value is taken as an observation quantity, frequency deviation caused by mechanical vibration of a carrier and crystal oscillator frequency drift of the receiver is calculated by the adoption of an alpha-beta filtering method, a carrier frequency shift predicted value is obtained to correct the tracking loop in a feedforward mode, and the step of inertial information assisting the GNSS tracking loop is finished. The dynamic stress action on the tracking loop by high dynamic is reduced, frequency deviation caused by mechanical vibration of the carrier and crystal oscillator frequency drift of the receiver is eliminated, dynamic adaptability and navigation stability of the GNSS receiver are improved, and the application prospects are wide.