The utility model relates to an assembly and disassembly tools of steam turbine wheel bolt, including four paws spanner and locking spanner, this assembly and disassembly tools still includes U shapedsteel frame and adjustment sleeve, the one end of U shaped steel frame with four paws spanner threaded connection, the other end of U shaped steel frame with the adjustment bush thread connect, installation in the adjustment sleeve the locking spanner. This assembly and disassembly tools convenient to use, the operation of being convenient for, the reduction personnel, the crowded wounded dangerof damaging of a greatly reduced people reduces the possibility that bad thermal technology's measurement station was moved or bumped to the mistake, after using this assembly and disassembly tools, work efficiency improves, uses manpower sparingly, guarantees the time limit for a project, establishes the basis for the unit starts in advance, guarantees heat supply unit heat supply on time, guarantees to supply thermal safety.