Sorting device and automatic sorting system

The invention provides a sorting device. The sorting device comprises a conveying mechanism, at least one sorting mechanism and a plurality of flow dividing assemblies. The conveying mechanism has a conveying direction and is used for conveying goods to be sorted. The sorting mechanism is arranged below the conveying mechanism, the sorting mechanism comprises a second rolling assembly, and the second rolling assembly can be in contact friction with the first rolling assembly, so that the first rolling assembly can rotate in the first flow dividing direction or the second flow dividing direction. The first flow dividing direction and the second flow dividing direction are formed on the conveying mechanism, and the first flow dividing direction and the second flow dividing direction are located on the two sides of the conveying direction correspondingly. The multiple flow dividing assemblies are arranged in the first flow dividing direction and the second flow dividing direction correspondingly, and each flow d