Abstract: Based on the characteristic of morphological changes of the loop, establishing a mathematical model for warp loop structure by the nonlinear curve equation and obtaining a 3-D model for warp loop structure. Based on computer vision, using light and texture to do with loop model and getting light model and texture map model. With Visual C++ and 3-D graphics processing technology of OpenGL, developing a simulation program and making the warp 3-D simulation come true. As shown in the simulated graphics of warp knitted fabrics, after light and texture progress, the simulation is similar with the actual, and have a good realistic three-dimensional.