Cleaning roller capable of being installed on cleaning robot and automatic cleaning robot

The utility model discloses a cleaning roller capable of being installed on a cleaning robot and an automatic cleaning robot. The cleaning roller includes: a sheath including a housing, an outer diameter of the housing tapering from a first end portion of the sheath and a second end portion of the sheath toward a center of the cleaning roller; and a core body extending from a first end portion ofthe core body to a second end portion of the core body along a rotation axis of the cleaning roller, the cleaning roller being mountable to the cleaning robot to rotate about the rotation axis. The sheath comprises a supporting part, and the supporting part is located between the first end part and the second end part of the core body and is supported by the core body in the radial direction; a first unsupported portion located between the first end of the core and the support portion of the sheath and radially unsupported by the core; and a second unsupported portion located between the second end of the core and the