Generator valve lock

The utility model discloses a generator valve lock which comprises a regulation rod, and a pull rod connected with the extension arm of the regulation rod, wherein the pull rod is in sleeve joint with or penetrates the extension arm of the regulation rod; an adjusting screw nut is arranged on and moves up and down along the extension arm of the regulation rod or the pull rod. The valve lock can be used in combination with a current cylinder adjusting open/close of the valve, so that the valve can be adjusted by the cylinder and a hand-operated way at the same time, thereby reducing security risks of air leakage of a generator, saving material replacement and facilitating safety production.