In this paper,in order to optimize the shoulder-sleeve structure of the Jingpai cheongsam,two methods of adding shoulder slant and splitting the excess amount of underarm to optimize the problem of shoulder-sleeve ill-fitting of Jingpai cheongsam which leads to the accumulation of a lot of folds in the underarms,and then solves the problem of the loss of the arm movement caused by this problem through sewing the rhombus-shaped piece of clothing in the underarms and adding the insertion angle in the underarms.This paper uses clo3D software to simulate and present the optimization process and results.