The utility model discloses an assembly and disassembly tools that is used for circuit breaker mechanism energy storage chain, including first member and second member, first member and second member are articulated through the axial cross of middle round pin, the one end of first member is equipped with first kink, and the other end of first member is equipped with the slice head that is used for to the elasticity card that pushes away mechanism's energy storage chain, the one end of second member be equipped with with the cooperation of first kink is in order to distinguish the second kink in two shaft holes of insertion device energy storage chain head and the tail, and the other end of second member is equipped with the six prismatic heads that are used for dismouting hexagonal socket nut. The utility model has the advantages of simple structure, easily preparation, convenient to use can improve the dismouting efficiency of mechanism's energy storage chain.