In order to overcome the shortcomings of manually cutting the bowl-shaped jellyfish, with inefficient and costly, high consumption of energy and serious pollution, a new bowl-shaped jellyfish spiral cutting system driven by a servo electric cylinder was designed. The corresponding three-dimensional solid model was constructed by using SolidWorks software and the dynamics simulation of the spiral cutting system was completed by HyperMesh/LS-DYNA software. Moreover, the process of cutting jellyfish with spiral cutter, the process of jellyfish skin failure and knife path formation were dynamically simulated. The change curve of shear force, and the characteristics of stress, strain and dynamic during the cutting process of jellyfish were obtained, and the validity of the simulation results was confirmed by experiments.