The invention discloses an aluminum foil winding device which comprises a flattening unit, a cutting-off unit, an aluminum foil feeding unit, an upper pressing unit, lower pressing units, a left flattening unit and a right flattening unit which are all mounted on a fixing unit. The fixing unit comprises a pair of oppositely arranged mounting frames, each mounting frame is connected with a turning plate capable of rotating, the two turning plates are fixedly connected with each other, each turning plate is provided with a U-shaped rolling-out groove therein, the arc end of each U-shaped rolling-out groove is arranged at the center of each turning plate, and the lower pressing units are mounted on the corresponding turning plates. After aluminum foil winding is completed, a turnover unit drives the lower pressing units to rotate around an aluminum foil reel so as to move away the lower pressing units from the bottom of an aluminum foil coil and enable openings of the U-shaped rolling-out grooves to open obliquely downwards to enable the aluminum foil coil to roll out from the U-shaped rolling-out grooves through gravity, and the aluminum foil coil is moved out from the device. The aluminum foil winding device has the advantages of high automation degree and low labor intensity for workers.