A series of one-dimensional compression tests were carried out under different loading processes of Yanglin shiplock. Different consolidation loading steps were studied. The time-hardening creep model and extended D-P model were used to obtain the subgrade settlement after construction in different loading methods and the subgrade was taken from the highway near Yanglin shiplock. The results show that under the multistage loading test,the time between the main and secondary consolidation points is larger,which indicates that the completion time of the main consolidation is higher than that of the first loading test. Simulation results show that the subgrade settlement without considering the creep situation is smaller than that with considering the creep situation. In the case of considering the creep situation,the settlement of the single loading is greater than the multi-stage loading. The correction of multi-stage loading for reducing subsidence settlement is verified.