Now the Mechanical Properties of fabrics is widely studied, but always involve in one kind of fabric or a certain property. In order to further understand the fabric tearing strength comprehensively, through a lot of experiments, this article mainly study the single or multiple influences of warp and weft fineness, warp and weft density, warp and weft yarn strength, break elongation of warp and well yarn, fabric thickness of five fabrics on single stitch tearing strength and trapezoid tearing strength. Then we use SPSS statistical analysis tools to conduct multiple linear regression analysis. We can conclude that warp and well tightness of fabrics, warp yarn strength, elongation at break of weft yarn have the influence on tearing strength; When trapezoid Angle is changed from 27 degrees to 45 degrees, the influence of warp and weft tightness on it will become bigger, but the influence of warp yarn strength, elongation at break of weft yarn on it will become smaller, and so on.