The utility model discloses a high temperature gasification water heater, including the furnace body, be equipped with high temperature gasification burning chamber on the furnace body, high temperature gasification burning chamber is connected with material pushing cavity and the waste heat absorbs the chamber, and the waste heat absorbs the vertical setting in chamber, and high temperature gasification burning intracavity is equipped with supply duct and a plurality of transversal arrangement's main heat absorption water pipe, one of them main heat absorption water pipe is connected with water supply installation, the waste heat is equipped with annular heat absorption chamber on absorbing the chamber, is equipped with the delivery port on the annular heat absorption chamber, one of themmain heat absorption water pipe and annular heat absorption chamber intercommunication, the utility model discloses utilizing the supply duct that form annular wind to make fuel fully burn in high temperature gasification burning chamber, arranging heat absorption water pipe promptly at high temperature gasification burning intracavity, the absorbed heat is not accompanyed the air current to getinto the waste heat to absorb the chamber and by the endothermic cavity configuration absorption of annular, improved heat utilization rate greatly.