Electric mechanical autonomous battery replacing system, crane and autonomous battery replacing method of crane

The invention discloses an electric mechanical autonomous battery replacing system, a crane and an autonomous battery replacing method of the electric mechanical autonomous battery replacing system. The autonomous battery replacing system mainly comprises a control circuit composed of a battery replacing box, a first power battery pack, a second power battery pack and a management control unit; the first power battery pack and the second power battery pack are connected to the control circuit through a circuit quick-plug connector, and are communicated with the management control unit through the battery changing box; the output end of the management control unit is connected with an equipment power system, and the management control unit controls on-off of the first power battery pack and the second power battery pack through the battery changing box so as to switch power supply modes. The crane is matched with a hoisting mechanism of the crane, the power battery pack is automatically replaced through hoisti