The utility model discloses an assembly and disassembly tools of hydro -generator rotor magnetic pole aims at providing a convenient to use's assembly and disassembly tools of hydro -generator rotor magnetic pole. It welds the lug on the hanger plate up end including the hanger plate that is the rectangle to and be banding clamp plate, one side of hanger plate be provided with two be used for with the dovetail of magnetic pole trapezoidal portion gomphosis, the lug is located the opposite side of dovetail, the clamp plate lies in the hanger plate upper end and lies in dovetail department, sets up on it to go up the first screw that the screw corresponds with trapezoidal of magnetic pole, and its middle part is provided with a second screw, first screw top spin is twisted there is the bolt, second screw top spin is twisted there is the screw rod. The utility model discloses can show the work load that reduces the magnetic pole dismouting and handle, reach reduction of erection time, cost -effective purpose, produce better economic benefits and social.