Aiming at the weak structure of transmission parts of center drive mill claw, the finite element analysis is conducted by the use of three-dimensional modeling and NASTRAN modulesintegrated in UG NX software. Analysis on the original results shows that the max Von mises stress is higher than the material yield stress, and the weak point of original structure appears on the connection between claw columns and cross slot. Both improved models A and B can significantly improve the structural strength. Data show that the quality of model B is light, and the stress of model B is less than that of model A, which indicates that the transitional connection between conical and cylindrical surfacemeets the practical requirements, thus providing the basis for subsequent optimization.