Abstract: In order to improve the efficiency of fabric appearance simulation algorithm, an improved fast algorithm of fabric appearance simulation was put forward. We improved the yarn model, and established a buckling illumination model based on fabric floats by using polygon depth-buffer algorithm of computer graphics, in combination with the reflective trait of yarn and the effects of fabric floats. Finally, utilizing image technology, the simulated fabric has a stronger true sense. The results of experiment show that the algorithm which uses methods of 2-D images reaches the purpose of 3-D simulation, greatly reduces operational complexity and enhances efficiency.