Abstract: This article presents a study of the carrier tracking loop of the global navigation satellite system (GNSS) receiver in high dynamic conditions. After analyzing the model of high dynamic signals, a quasi-open-loop carrier tracking method based on unscented Kalman filter (UKF) is proposed. This new method can eliminate the influence of binary phase shift keying(BPSK) modulation, and it adopts the four-dimensional UKF phase estimator to increase tracking precision and compensates for the estimated values to reduce the hysteresis of the filter. By simulating the high dynamic trace of a receiver, this quasi-open-loop structure is compared with the structure of frequency locked loop(FLL) assisted Kalman filter (KF) based phase locked loop(PLL) chiefly in terms of tracking errors, tracking results and compensation effect. Simulations show that the proposed quasi-open-loop structure for high dynamic carrier tracking loop based on UKF can effectively complete the task of carrier tracking in a high dynamic environment.