Waterfall type water circulation mechanism for dish washing machine

The utility model discloses a waterfall type water circulation mechanism for a dish-washing machine, which comprises a box body, a placing frame fixedly arranged at the upper end of the box body, a conveying belt fixedly arranged in the placing frame and a cleaning frame fixedly arranged at the upper end of the placing frame. The water circulation assembly is fixedly arranged in the box body and the cleaning frame, hot water can be recycled, water resources are saved, electricity resources are also saved, and therefore waste of the water resources and the electricity resources is reduced; through the arrangement of the threaded rod, the driving motor, the threaded block, the movable sleeve, the spring, the sliding rod and the cleaning rod, the filter screen can be cleaned, the situation that the filter screen is blocked after being used for a long time, and consequently recycling of water resources is affected is prevented, and the filter screen is convenient to use, simple in structure, easy to operate and s