NOVELTY - Photovoltaic electrothermal rapid fermenting device has fermentation tank, stirring blade, battery board, feeding port, discharging port, electric heating wire, electric motor, main shaft, temperature control switch, temperature control contact, switch-I, switch-II and electric heating board. The upper portion of the fermentation tank is provided with feeding port. The lower portion of the fermentation tank is provided with the discharging port. The main shaft is set in the fermentation tank.    USE - As photovoltaic electrothermal rapid fermenting device.    ADVANTAGE - The device is environmentally-friendly, receives less influence from the external environment, enables to control the fermentation process easily, improves fermentation quality, provides temperature suitable for growth and propagation of yeast and bacteria, finishes the earlier stage of fermentation within 24 hours, reduces fermentation time, provides uniform heat, and saves electric power, as the electric power is produced by solar battery board.    DETAILED DESCRIPTION - Photovoltaic electrothermal rapid fermenting device has fermentation tank, stirring blade, battery board, feeding port, discharging port, electric heating wire, electric motor, main shaft, temperature control switch, temperature control contact, switch-I, switch-II and electric heating board. The upper portion of the fermentation tank is provided with feeding port. The lower portion of the fermentation tank is provided with the discharging port. The main shaft is set in the fermentation tank. The output shaft of the electric motor is in transmission connection with the main shaft. The main shaft is provided with electric heating wire. The outer portion of the main shaft is fixed with the stirring blade. The electric heating board is fixed on the outer wall of the fermentation tank. The switch-I is connected between the power supply input end of a temperature control switch and the power supply output end of the battery board. The power supply output end of the temperature control switch is connected with the electric heating wire and the electric heating board. The switch-II is connected between the electric motor and the battery board. The temperature control contact is set in the fermentation tank. The signal input end of the temperature control switch and the temperature control contact are electrically connected.