Manual emergency operating device for crane

The utility model relates to a manual emergency operating device for a crane, which relates to the field of a retractable device of a naval vessel and is characterized in that the device comprises a hydraulic cylinder, a hydraulic motor, a crank handle, a hydraulic valve block, an oil tank, an energy accumulator and a manual pump. The manual pump is communicated with the energy accumulator and the oil tank through an oil tube, and the crank handle is in a ratchet wheel type anti-reversal structure. The manual emergency operating device for the crane aims at completing emergency operation under the condition that a power supply is cut off, and a hydraulic system control unit breaks down or the power supply is cut off, and the energy accumulator is free from pressure, so as to ensure the safe retraction of a small boat in a full load state.