As a main member of NC machine tool, the feeding system directly affects the machining accuracy and efficiency of NC machine tool, so the analysis of the static and dynamic characteristics is of great significance. The static and dynamic characteristic of the feeding system was analyzed by using the finite element method, and the static deformation nephogram, natural frequency and vibratory characteristic of the feeding system were obtained. The analysis results show that the maximum deformation of the feed system is 5.6 μm, the maximum yield stress is 2.8 MPa, and the safety factor reaches 15, all the above meet the requirements, which shows that the system structure stiffness is good and the design is reasonable; the modal analysis results provide theoretical basis for preventing resonance and ensuring machining quality, it has certain value for engineering application.