The invention discloses a manual operation device of a low-voltage switch device. An operation handle is provided with a fixing groove matched with a second fixing plate, the second fixing plate is arranged in the fixing groove, and a reset torsion spring is arranged between the second fixing plate and the fixing groove. A pawl is rotationally mounted on the second fixing plate through a fixing pin and rotates around the fixing pin, one end of a first reset spring is connected with the top end of the pawl, the other end of the first reset spring is connected with the operation handle, and the operation handle is mounted on a mounting shaft of an operation mechanism. A rotary shaft is mounted on a mounting plate, and a rotary shaft of a rotary shaft energy storage mechanism, a mounting shaft and a rotary shaft are different. A ratchet is rotationally mounted on the rotary shaft, and the bottom end of the pawl is clamped among teeth of the ratchet. A locking dog is mounted at the bottom of the mounting plate and rotationally mounted on the mounting plate, the top end of the locking dog is clamped among the teeth of the ratchet, one end of a second reset spring is connected with the bottom end of the locking dog, and the other end of the second reset spring is fixed on the mounting plate.