The application relates to a sketch-recognition-based fast generation method and
system of a garment three-dimensional model, and relates to the technical field of three-dimensional model generation, which comprises the following steps: collecting a garment sketch uploaded by a user and demand input information; generating a garment image according to the garment sketch; generating a garment initial three-dimensional model according to the garment features extracted from the garment image; calling input types and demand contents based on the demand input information; extracting the demand contents based on the input types to obtain input fabrics and input colors; combining the input fabrics and the input colors, optimizing the garment initial three-dimensional model to generate a garment final three-dimensional model, and outputting the garment final three-dimensional model. The application has the effect of improving the generation efficiency of the garment three-dimensional model.