Abstract: Provided is a dental cleaning device. In the device, by arranging the water pump, the mixing mechanism and the rotating blade, clean water in the water tank enters the input pipe through the first hose and the three-way valve under the action of the water pump, and toothpaste in the toothpaste chamber also enters the input pipe through the three-way valve under the action of the toothpaste pump, and the mixture of clean water and toothpaste enters the mixing chamber through the input pipe to drive the rotating blade to rotate, so that toothpaste and water may be fully mixed, and toothpaste may be effectively prevented from being blocked in the electric toothbrush.