Abstract: The calculating method of retaining wall in shield work well of metro station is discussed. The internal forces of the wall are observed in a station of Shanghai Metro Line-2. When the soil is treated by the deep mixing method, the maximum internal force variation occurs,and a relatively smaller variation occurs during the excavation of foundation pit. When the lining wall was built, the internal forces change little during the cut of shield cave and the transportation of shield machine into or out of the well.