In order to study numerical simulation techniques of pressed pile test and the difference of numerical simulation and field test, based on high-piled wharfs of Zhanjiang port, pressed pile test and numerical simulation of three large diameter steel pipe piles of the two wharfs in this paper. Anchored pile method is used in pressed pile test, and the curves of Q-s and ultimate bearing capacity are attained. Then the three piles are numerically simulated by ABAQUS, and results of numerical simulation and filed test are comparative analyzed. The results show that sedimentation value of numerical simulation is bigger than that of field test in the loading process,the difference value increasing with the increasing of load, and the ultimate difference value of sedimentation is about 20% to 30%.