In a Soto structure, the cables run through the structure via pulleys to carry the loads, rather than being fixed to the structure. The relative sliding between the ropes and pulleys transmits the internal forces, so the contact between the ropes and pulleys is the key and difficult point of the structure. The contact problem belongs to the boundary condition nonlinearity, not only has a high degree of nonlinearity, but also the specific calculation is very complex. In this paper, we discuss in detail how to use ANSYS software to deal with the contact problem of Soto structure for several types of contact.