The invention discloses an automatic cleaner for an inner wall of a
nonmetal container with a
small mouth and a large cavity. The automatic cleaner comprises a cleaning box, wherein a gear ring cavityis arranged in the cleaning box; a rotating rod penetrating through the top surface of the cleaning box is rotatably installed in the bottom wall of the gear ring cavity; a long rod drives a second gear to rotate; the second gear drives a rotating block to rotate through meshing with a second gear ring; the
nonmetal container is placed between a cavity and a screw plate; the rotating rod is driven to rotate through a rotating knob, so that the screw plate moves up and down to adjust the distance between the screw plate and a supporting plate; the bottom surface of the screw plate is attachedto the top surface of the
nonmetal container, and the nonmetal container does not shake when a cleaning mechanism cleans the nonmetal container; and a power mechanism drives a cleaning rod in the cleaning mechanism to move up and down and simultaneously rotate, and therefore the inner wall of the nonmetal container can be cleaned.