Self-circulation anti-freezing solar water heater

The utility model discloses a self-circulation anti-freezing type solar water heater which comprises a water heater body, one end of the water heater body is fixedly sleeved with a supporting frame, the two sides of the bottom end of the supporting frame are connected with supporting bases in a penetrating and inserting mode, and the other end of the water heater body is movably sleeved with a plurality of black covers. The self-circulation anti-freezing type solar water heater comprises a protection frame, an auxiliary sleeve, a supporting shaft, a spring and a supporting block, a plurality of black covers are arranged on the protection frame, a plurality of guide pipes are connected to the top ends of the black covers in a penetrating mode, limiting rings are connected to the top ends of the adjacent guide pipes in a penetrating mode, and two supporting blocks are fixedly installed on the two sides of each limiting ring. The multiple protection frames are all located at the top of the water heater body and