The utility model relates to a power distribution switch maintenance system, especially a power distribution switch state monitoring and optimization maintenance system. According to the power distribution switch state monitoring and optimization maintenance system, organic fusion is carried out based on multi-state quantity monitoring and acquisition. The power distribution switch state monitoring and optimization maintenance system is characterized in that the power distribution switch state monitoring and optimization maintenance system includes a state monitoring terminal, an inspection monitoring terminal, a field comprehensive test terminal and a state maintenance aid decision making data storage unit. The power distribution switch state monitoring and optimization maintenance system has the advantage that functions such as power distribution switch state monitoring and optimization maintenance aid decision making based on multi-state quantity fusion can be realized, and therefore, a state maintenance aid decision making system can make comprehensive judgments based on state information of inspection, routine testing and on-line monitoring which comprises phenomenon strength and quantity values, and therefore, the operation state of a power distribution switch can be acquired accurately, and power distribution switch maintenance projects and construction periods can be arranged reasonably according to evaluation results, and maintenance cost can be decreased to a greater degree.