The invention discloses a self-adjustment anti-blocking closestool, and belongs to the field of closestool devices. The self-adjustment anti-blocking closestool comprises a closestool body, a flushingpipeline, a water sealing pipeline, a drainage pipeline, and an anti-blocking adjustment device arranged among the flushing pipeline, the water sealing pipeline and the drainage pipeline. The anti-blocking adjustment device comprises a cleaning ball, a pull rope, a return spring, a rope winding runner, a motor and a controller; the cleaning ball is fixed to one end of the pull rope; the other endof the pull rope is fixed onto the rope winding runner; the rope winding runner is coaxially fixed onto the motor; the other end of the cleaning ball is connected onto the return spring; a liquid level sensor is arranged on the outer wall of the waist part of the front side of the closestool body; and the motor is fixed to the front side of the flushing pipeline. According to the self-adjustmentanti-blocking closestool provided by the invention, the motor drives the rope winding runner to rotate, and the cleaning ball is pulled to move along the water sealing pipeline and the drainage pipeline from a return port so as to bring out foreign matters, so that accumulated water in the closestool is discharged smoothly, and cleaning is accomplished through self-adjustment when the closestool is blocked.