Cutter suction dredger is considered to be an effective dredging tool in the dredging industry，and its cutter has a great influence on the dredging capacity. At present，the cutter body is mostly manually modeled during the design process. The cutter arm，big ring，and hub are the main structure of the cutter，and their modeling faces many problems，such as massive parameters，cumbersome modeling，and low precision. In order to shorten the modeling cycle and improve the modeling accuracy，this paper proposes a parametric cutter body modeling method，uses C# programming language to realize Solidworks’s secondary development，and calls the built-in API interface to realize the parametric and automatic generation of the three-dimensional（3D）cutter body model. Based on the concept of object-oriented programming，the paper develops a modeling software for the cutter body based on the SolidWorks platform，which ensures that the cutter parameter modeling and cutter performance calculation are carried out in parallel，and it also puts forward a standardized and parametric creation of the cutter. The research results can provide a reference for the performance optimization of the cutter body.