Abstract: A comparative study was conducted on zipper sewing technology of knitted apparels through experiments.Factors affecting sewing quality of zipper such as bulky joints were investigated.Analysis of the experiment results suggested that there are two major factors affecting sewing quality of zipper on knitted apparel,one is the amount of differences between knitted fabrics and zipper in length,and the other is the amount of differences between left and right in length.These findings have set forth theoretical basis for the design of sewing technology and some importance directions for production of the enterprise.