In this paper,ANSYS is used to establish a three-dimensional model to study the influence of different working conditions on the bearing behavior of large span non-complete bent structure for high-pile wharf.The results show that the load of portal crane has great influence on the internal force of piles,and the uniform load mainly affects the internal force of the middle longitudinal beam and cross beam,while the load of portal crane is the key factor for the internal force of track beams；the axial force of the piles under the middle longitudinal beam is obviously larger than that of the piles under the track beam,while the pile bending moment increases gradually from the wharf front to the land side；the double straight piles under the track beam between the adjacent bents play a role of stress redistribution in the internal force of the track beam,so that the stress of each track beam is more uniform,which is conducive to the synergistic effect of each cross-track beam and the joint bearing effect.