The study of the force influence of asymmetrical pressure on boxtype shed structure is very important to provide theoretical basis for some similar projects. As a result, a road shed is taken for an example to carry out calculation and analysis by ANSYS finite element numerical simulation method. The results show that: (1) The bearing force on the bottom of the side wall and the top of the outside wall of the boxtype shed with eccentric backfilling is relatively large, which need to be strengthened in the design of reinforcement. (2) The lateral stress of backfilled soil on mountain side has a great influence on the structure of the shed; the structure internal force of the backfill can be improved by grouting to reduce the internal force of the shed; the economic benefits can be the highest when the internal friction angle reaches 47°. (3) The backfill of EPE on top of open tunnel can reduce the load impact on tunnel top and the internal force, and the optimal backfill thickness is 0.9 m.