Abstract:At present, the reconstruction of 3D models mainly uses the forward modeling method to generate the required 3D models through modeling software (such as C4D, 3Ds MAX, Alias) through pre-designed object shapes, sizes, colors, textures, etc.This method requires high professional knowledge and software operation ability of the designer, and takes longer to design.It is not suitable for objects with complex shapes and structures.In order to solve these problems, a reverse modeling method is adopted.The pictures taken by mobile phones are used for camera calibration and coordinate transformation to generate a three-dimensional model of the object in a short time.Test results show that he model has good accuracy and can meet a series of practical application requirements such as 3D printing.