The invention discloses a heat-storage-bar-type water boiler and a use method. The heat-storage-bar-type water boiler is characterized in that the heat-storage-bar-type water boiler consists of a sandwich layer heat preservation container, a heat buffer pipe, a heat storage bar, a heat preservation cover and a heat storage bar heat preservation cover, wherein the heat storage bar and the heat buffer pipe are respectively and independently arranged. The existing water boiler uses electricity or combusts fuel gas to boil water, is greatly limited by a power supply and a fuel gas source, and cannot be used in fields or other open places without the power supply and the fuel gas source. Two independent systems, i.e. a heat source and the water boiler are used, the heat source is not limited by the power supply and the fuel gas source, the power supply and the fuel gas source can be used as a source of heat, and the heat storage of the heat storage bar can also be realized through solar light condensation or high-temperature waste heat recycling at the same time. The heat-storage-bar-type water boiler has the advantages that the structure is simple, the process is simple, the cost is low and the industrialized, standardized and series production can be realized. The heat-storage-bar-type water boiler belongs to the fields of heat utilization and solar energy utilization.