In the engineering,the bored cast-in-situ soldier-pile is often used as the supporting structure of the foundation pit,and the solution program for a foundation pit called Lizheng is commonly used to design the supporting scheme.The supporting row of piles of the double-locks called Wannian can’t be anchored as usual.Therefore,the supporting row of piles is restrained by an L-shaped cap-beam.Besides,the elevation of the button of the foundation pit varies greatly,which results in a more obvious spatial characteristic of the foundation pit.All the above indicate that Lizheng may not give an accurate solution to the supporting scheme.This paper simulates the mutual effect of the structure and soil based on software ABAQUS,and analyzes the calculation result,which may serve as reference for the similar engineering design.