According to Code for Soil Foundation of Port Engineering (JTS 147-1—2010), we obtain a formula for calculating the foundation’s bearing capacity of gravity wharf based on homogeneous soil(φ>0)and side loading, which is calculated originally by dividing the foundation width into many intervals and summing the ultimate bearing capacity. The intersection point b交=0.5Be is derived by the ultimate bearing capacity curve and the design load curve. The formula is verified by the two methods in the same example.