NOVELTY - The device has a solar hydrogen new energy supply device and an electric cotton picking device that are connected with each other. The cotton seeds are inputted to a cotton seed storing box (22) by a cotton seed delivering device (21). Lint cotton is transferred out from the picker by the lint cotton outlet (25). The driver is sit on a seat in the cab (16) to operate the components of electric cotton picker with a solar hydrogen fuel battery to finish picking, delivery, pressing and storage operations of cotton and rotation of the front and rear running wheels (15,27).    USE - Power device using solar hydrogen energy in cotton picker.    ADVANTAGE - The driver regulates operation of the components of the cotton picker efficiently.    DETAILED DESCRIPTION - The electric cotton picking device has a gatherer (13), a cotton picking chamber (14), a seed cotton delivering device (17), a seed cotton inlet (18), a seed cotton storing box (19), a cotton pressing device (20), a seed cotton delivering device (21), a seed cotton storing box (22), a lint cotton storing box (24), a lint cotton outlet (25). A portion of new solar hydrogen energy supply device has a hydrogen fuel storing container (7), a hydrogen fuel delivering tube (8), a hydrogen fuel battery (9), wires (3), a motor (10), a power output shaft (11). A mechanical transmission device (12) is installed in the power device box (26) on bottom of the solar hydrogen fuel battery electric cotton picker (23). Sunshine irradiates 1-100000 solar batteries installed on the supporting column to generate current. Current is inputted to the electrolysis water hydrogen making device (4) to generate hydrogen through the wires (3). Hydrogen is inputted to the hydrogen fuel storing container making workshop (6) through the hydrogen delivering pipeline (5) to make hydrogen fuel suitable for stored in the hydrogen fuel storing container. The hydrogen fuel storing container (7) full of hydrogen fuel is transferred from the hydrogen fuel storing container workshop (6) and placed in preset position in the power device box (26) on bottom of the electric cotton picker with a solar hydrogen fuel battery (23). The hydrogen fuel output from the hydrogen fuel storing container (7) is inputted to the hydrogen fuel battery (9) through the hydrogen by the hydrogen fuel delivery tube (8) and emits electric energy by electrochemical reaction in the hydrogen fuel battery. The power output shaft (11) of the motor (10) is transmitted the mechanical energy to a mechanical transmission device. The front running wheels (15) and rear running wheels (27) are driven by the mechanical transmission device (12) to rotate and drive the electric cotton picker with a solar hydrogen fuel battery (23) to move forwards. A gatherer (13) is used for straightening the cotton plant and guides it to the cotton picking chamber (14) to pick cotton. The picked cotton is entered the seed cotton delivering device (17) by the cotton picking chamber (14) and is delivered to the seed cotton inlet (18) by air flow in the seed cotton delivering device (17) and temporarily stored in the seed cotton storing box (19) through the seed cotton inlet (18). The seed cotton is divided into lint cotton and cotton seeds in the cotton pressing device (20). The lint cotton is inputted to a lint cotton storing box (24).    DESCRIPTION OF DRAWING(S) - The drawing shows an explanatory view of the power device.    Wires (3)    Hydrogen fuel storing container (7)    Hydrogen fuel delivering tube (8)    Hydrogen fuel battery (9)    Motor (10)    Power output shaft (11)    Mechanical transmission device (12)    Gatherer (13)    Cotton picking chamber (14)    Front and rear running wheels (15,27)    Cab (16)    Seed cotton delivering device (17)    Seed cotton inlet (18)    Seed cotton storing box (19)    Cotton pressing device (20)    Cotton seed delivering device (21)    Cotton seed storing box (22)    Solar hydrogen fuel battery (23)    Lint cotton storing box (24)    Lint cotton outlet (25)    Power device box (26)