Abstract: According to the imperfect design level of domestic double-cylinder computer hosiery machine and lack of the theory research for the key mechanisms, it is mainly researched the dynamic analysis of the knitting element for double-cylinder computer hosiery machine. The SolidWorks software has wide functions which are 3D mechanism structural design, product modeling, and design optimization function. The SolidWorks was applied to set up the 3D model of knitting element. On this basis, the knitting element’s solid model was guided to ANSYS/LS-DYNA system which realized the computer’s movement simulation of the lead wire, the needle, and the cams. It also studied their displacement, velocity, acceleration, and force conditions when the contact-compact of the knitting elements happened. Then, the needle and the cam were optimized by design. Furthermore, the high-speed shooting and image data processing were applied to the experiment, and the research findings’ accuracy of the ANSYS/LS-DYNA was certified. The research findings show that the acceleration’s maximum value of the needle is 6.7×10^7 m/s^2, and the stability of the needle can be controlled when the double-cylinder computer hosiery machine is in high-speed motion.