Domestic heating water-heating device

The utility model relates to a domestic heating water-heating device. The utility model aims to solve the problem that the residents who have the central heating facilities inconveniently bathe, wash hands, wash faces, wash vegetables and cook as the temperature of the tap water is low. The utility model utilizes the heating water of the family as the heat source. The interior of the water heater adopts an exhaust pipe heat exchanging structure. A water inlet pipe and a water outlet pipe are arranged as continuity, discontinuity, middle temperature water and high temperature water. The utility model has the advantages that the electricity and the fire are not used; no electrical and mechanical operations are used; the utility model is safe and convenient; the energy is saved; the maintenance is free. The utility model is corresponding to the family is additionally provided with one set of hot water supply facility in winter, and is a great innovation of the hot water supply engineering of the people daily life and the building industry.