The threedimensional (3D) entity model of a type of boring bar in the software Pro/E was established. The statics analysis〖JP〗 and finite element modal (FEM) of the boring bar system was done with using of the finite element analysis (FEA) software ANSYS120. Among which the statics analysis included were the analysis of shift and stress in the X, Y and Z direction after loading, it was found that deformation of the total stress in the Y direction was maximum. Also, in the analysis of shift and stress in different feeds, it was concluded that deformation of boring bar increased within the permissible range along with the increasing of load. Modal analysis was used to get the boring bar system of natural frequencies and vibration modal shapes. Structural optimization is done to this boring bar, and the effects of design improvement are verified by experiments, which will provide references for the actual production process.