Energy-saving solar gas water heater

The invention is suitable for the field of water heaters, and provides an energy-saving type solar gas water heater which comprises a solar water heater body provided with an exhaust valve, and further comprises a heat storage assembly connected with the exhaust valve through a first gas guide pipe, and the outer side of the first gas guide pipe is wrapped with heat preservation cotton; a heat storage box is arranged in the heat storage assembly, and one end of the first air guide pipe extends into the heat storage box. Heat is exhausted from the exhaust valve along with redundant gas, the exhausted gas enters the heat storage box through the first gas guide pipe, the heat in the gas is absorbed by the heat storage medium and stored, the heat is recycled, and waste of the heat is avoided; cold water is introduced into the heat preservation box, the temperature in the heat preservation box is reduced, the heat storage medium releases heat, the heat enters the heating shell along the second gas guide pipe to he