Solar heat storage water tank with heat exchange medium

The utility model discloses a solar heat storage water tank with a heat exchange medium, which comprises a water tank and a heat exchange device arranged in the water tank, a solar heating device is arranged on one side of the heat exchange device and the water tank, the water tank comprises an inner tank and an outer tank, and an interlayer is arranged between the outer tank and the inner tank. An upper heat exchange pipe and a lower heat exchange pipe which are connected with the heat exchange device are arranged in the interlayer; the solar heating device comprises a solar heating pipe, an upper heat exchange bin arranged on the upper side of the solar heating pipe and a lower heat exchange bin arranged on the lower side of the solar heating pipe, a heat exchange water inlet is formed in the bottom of the lower heat exchange bin, and the heat exchange water inlet is connected with the lower heat exchange pipe. According to the solar water heater, the solar heating device and the water tank are arranged tog