Abstract: In order to choose moving curve of cam follower and raise the speed of warp knitting machines,this study applies the method of fuzzy comprehensive assessment to the choice of cam moving curve.It expatiates the basic request of lateral motion of the guide bar,analyses the main targets of the cam,confirms the weight coefficient of each target,and judges the moving curve commonly used in cam design.The results show that the revision sinusoidal motion curve can meet the requirement of lateral motion of the guide bar and it has certain theoretical value for cam production of warp knitting machine.