Abstract: The goal of this research is to improve shogging motion characteristic of the guide bar and reduce the impaction of shogging. The combined sine acceleration movement rule is chosen as the shogging motion curve of guide bar under the motion theory of machines and mechanisms by analyzing the motion characteristics of shogging movement of guide bar, and it is found that four factors influencing the shogging movement, that is, needle gauge, number of shogging needle space, the main shaft speed of warp knitting machine, and allowed shogging period，that is to say, to extend the shogging time under the condition of ensuring the safety and reliability of shogging movement with making the starting time earlier and postponing the ending time, the shogging movement performance can obviously be improved.