The 3D models of dynamic scroll disks in NX software are set up,the stress and deformation of dynamic vortex disks under the condition of the given gas load and constraint conditions are studied by the finite element analysis method,and the stress and deformation of scroll disk under coupled action of gas load and temperature load is also studied. Simulation results showed that,under the action of temperature load,maximum stress and deformation occurred at the tooth head of the vortex teeth,that the maximum deformation occurred at meshing points and that the maximum stress occurred at the center and the tail of the scroll teeth. The maximum stress was generated at the connections between end plate and scroll teeth while the maximum deformation occurred at the center and the tail of the vortex teeth.