Abstract: The characteristics of Jacquard warp knitted fabric were studied and the colorized design model was offered. The loop structure of the fabric was analyzed and its theoretical model was set up to confirm the number and position of control points of each type of loops. Two methods, i.e., segment and spline cure were used to describe the loop state with fuses on theoretical analysis. In order to show of displacement and distortion of loop, presenting a factual model of the loop. In simulation, considerations were given to information concerning the colorized design, the change of yarn tension resulting from lapping movement, fineness of yarn, color information, and the quality of material. Thus a good simulation was achieved.