The raw material is polypropylene filament, and the orthogonal experimental design was used which weave and tight were selected as the two factors, using the plain weave, twill, basket weave as the three levels of the weave, and the corresponding tight of 6, 11, 16 denim section of the twill as the three levels of the tight. The mechanical properties were tested, and the mathematical models have been respectively established through analysis of variance.