Abstract: To improve the classification research of female body shapes and the improvement of leather pants templates, this study used the experimental methods of three-dimensional body measurement to obtain body data, and analyzed the waist, abdomen, and hip features of young women based on the data. The results were used to improve the leather pants templates. A total of 200 young women from Sichuan province were recruited for three-dimensional body measurements to obtain body information. Based on the data obtained from three-dimensional scanning, parameters such as the corresponding heights and angles of waist, abdomen and hips were selected, and 22 shape feature items that affect the waist, abdomen and hips were extracted to obtain a basic data foundation for the classification of young women's body types. The main classification rules for waist, abdomen and hip body types were obtained, and the template structure of leather pants was optimized based on the analyzed body shape features. This study provided a theoretical basis for personalized customization of leather pants templates, and has practical significance.