Abstract:The impact cutter crusher will produce large excitation during operation. In order to study the relationship between the vibration and natural frequency of the crusher and avoid the occurrence of resonance, the finite element software is used to analyze the calculation mode of the impact tool crusher, the experimental mode is tested through the hammer percussion excitation experiment to check the calculation mode. The results show that the first 8 natural frequencies of the impact tool crusher are concentrated between 133.28 Hz and 272.18 Hz, and the main deformation parts are concentrated in five parts: feed inlet, bearing seat, rear wall of storage box, main shaft and impact plate. After the dynamic analysis of the main shaft and the optimization of the shell structure, the working frequency of the crusher well avoids the resonance frequency range, which provides a numerical basis for improved design of vibration reduction of the impact tool crusher and an effective method for the optimization of vibration reduction of crushed products.