The 3D deformation simulation system for 3D printing of customized sports equipment is a software for parametric editing of 3D mesh models in STL format, which has very flexible interactivity. The main functions of the 3D deformation simulation system for customized sports equipment 3D printing: (1) Have a user management system, which requires users to log in and use, and administrators can manage users (2) read, save the STL format 3D mesh file (3) Size estimation based on foot model (4) Rotate, translate, zoom and display the model (5) The model can be parameterized deformation area selection, you can do deformation processing on the selected area (6) can be fast switching perspective (7) The insole model can be scaled (8) can change the insole model thickness