In the paper, aiming at the high precision timing of the satellite navigation receiver using crystal oscillator to produce local clock, especially considering the non-positioning situation such as the loss of satellite lock, a time-synchronization control method with fast fitting was proposed, which improved the timing accuracy and availability of the satellite navigation receiver. This paper analyzes several key factors that affect the timing accuracy of satellite navigation receiver, and verified on a satellite navigation receiver. The test results show that the time synchronization control algorithm designed in this paper is effective and improves the timing accuracy and availability of the satellite navigation receiver.