Due to the delicacy of the material, stitch slipping occurs easier in silk garments than in the garments of other materials. Stitch slipping often occurs in the positions which are often subjected to stress, such as shoulder seam, side seam, and sleeve seam of the silk garment. The reasons of the stitch slipping in silk garments both from silk material itself and the manufacturing process of silk garments were analyzed. Sewing needle, stitch density and seam allowance were main manufacturing factors that affecting the stitch slipping in silk garments. By making experiments with silk garments of satin fabric, the influencing level of these three manufacturing factors were analyzed, at the same time the valuable reference data was also put forward.