In view of the problems that buses do not stop smoothly in and out of the harbor station, and the geometric size of the station is not fully compatible with the trajectory of buses, the bus stopping process of the same specification of the harbor station on Binhai Avenue, a main road in Qingdao, was analyzed, and the characteristics of the change of the traffic elements such as speed, acceleration, trajectory and other traffic elements and their interrelationships were analyzed, and the Gauss trajectory model of the bus geometric design parameters were established based on the trajectory data of the buses entering and exiting the station. The Gauss trajectory model was constructed based on the actual trajectory data of buses, and the geometric design parameters of the harbor station were optimized. The results show these as follows. The speed of buses in the deceleration section of the station shows a two-stage change trend, and in the acceleration section shows a single-stage change. The comprehensive acceleration of buses during the period of entering and exiting the station changes steadily, the longitudinal acceleration is changed from negative to positive, and the transversal acceleration is basically unchanged. The trajectory model is similar to the actual fitting trajectory with the similarity degree of 0.991 3; the radius of the turning curve during the process of entering and exiting the station of the harbor station is larger than that of the curve in the current specification. The radius of the turning curve in the process of entering and exiting the harbor station is larger than the radius of the curve in the current specification, the radius of the turning curve in the preparation for entering and exiting the stopping section is smaller than the radius of the curve in the current specification, and the length of the acceleration and deceleration sections is equal. Compared with the traditional station design, the optimized station design makes buses entry process smoother, improves the efficiency of the bus entry process and saves land area.