Abstract:With the fast development of spaceflight enterprise, it is catching more and more attention for problems arising from power quality in space tracking ship. Different types problems of power quality will occur because of bad earth, power on-off by high power radar, load change in power supply system on space tracking ship. The ability of un-corresponding will also reflect on the power quality between main and div distribution network. According to the special demand of space tracking ship, power quality monitoring system was designed and proposed by this paper, hardware composition and software design were described also. The actual application results showed that the system feasibility and convenience. It provides a effective method in analyzing the rules of power quality and equipment troubleshooting.