Abstract: Design the film picking parts of nail-tooth drum type residual film recovery device and analyzes the movement track of the nail teeth, and the conditions for the continuous operation of the diaphragm component are obtained.The 3 D model of the nail is established by using the 3 D modeling software SolidWorks, and the modal analysis and instantaneous dynamic analysis are performed by the finite element analysis software ANSYS.The modal analysis results show that,the minimum natural frequency of the nail is 206.57 Hz, and the first 6-order mode shape of the nail is obtained, which provides a theoretical basis for avoiding the resonance region and structural optimization design.The results of the instantaneous dynamic analysis show that,the total deformation of the nail is 0.027 61 mm, the maximum equivalent stress is 17.354 MPa, and the maximum elastic modulus of the nail is 8.31×10^-5 mm,and get the stress concentration position when nail teeth work, provide theoretical reference for the improvement of nail teeth.