Abstract: An environment-friendly shelling system and a sheller with multilayer modules thereof is provided, which relates to the technical field of agricultural processing devices. The sheller including a cylinder, fixed screens and rotating screens are provided in the cylinder, for each fixed screen, the fixed screen is arranged opposite to a corresponding one of the rotating screens, a shelling cavity for shelling is provided between the fixed screen and the corresponding one of the rotating screens, a mesh size of the fixed screen is greater than a mesh size of the corresponding one of the rotating screens, and a respective one of material receiving plates is coaxially provided below and co-rotated with the corresponding one of the rotating screens; feeding ports and discharging ports are provided on a side wall of the cylinder.