The invention relates to the technical field of solar equipment, in particular to a solar water heater supporting frame and a solar water heater. The solar water heater supporting frame comprises a front supporting frame and a rear supporting frame which are connected through a connecting part with a plurality of positioning protrusions and each provided with a plurality of positioning holes matched with the positioning protrusions, and the front supporting frame and the rear supporting frame are connected through clamping combination of the positioning protrusions and the positioning holes. The invention further provides the solar water heater with the solar water heater supporting frame. When the solar water heater supporting frame is installed, the positioning protrusions of the connecting part are inserted into the positioning holes in the front supporting frame and the rear supporting frame, and then the assembly of the front supporting frame and the rear supporting frame is finished. The assembly method of the supporting frame is simple and convenient to operate, and the assembly efficiency of the supporting frame can be effectively improved.