Abstract: The present disclosure provides a litter device, which comprises: a base having a concave groove; at least one support arm arranged on the base; a shell having a chamber and partially accommodated in the concave groove, the shell is rotatably connected to the support arm and rotated around an axis relatively to the support arm; a container arranged under the chamber, and having a collection cavity configured for collecting waste; wherein the chamber having an opening to allow pets to enter into, the shell is in shape of arc and having a center, the shell having an upper end and a lower end in the direction perpendicular to the axis, an angle between connection line of the upper end and the center and connection line of the lower end and the center is between 120-180 degrees.