Abstract: Under the excitation of the pump, the pipes of auxiliary system for primary loop have a problem of excessive vibration, and when the vibration is transmitted to the installed base, it may result in serious troubles. To solve this problem, the study on piping vibration control of auxiliary system needs to be carried out. First of all, the finite element model of the pipe for auxiliary system is established and the positions of the supports of the pipe are optimized using the optimization algorithm. Then, using the test method, the analysis on the vibration of the fixed end before and after optimization is carried out. On this basis, the vibration transmitted from the support to the installed base is reduced with Dynamic Vibration Absorber（DVA）. Finally, the optimization scheme of vibration control of the pipe is obtained. And it offers some references for the optimization design of vibration attenuation.