The utility model discloses a two-temperature hot water boiler which is characterized in that a boiler furnace body consists of an inner container, an outer container and a furnace wall; a boiler combustor is communicated with an inner opening at the front end of the inner container through a front smoke chamber; a first hot water cavity is formed between container walls of the inner container and the outer container; a first hot water cavity is respectively communicated with a first water inlet pipe and a first water outlet pipe; a second hot water cavity is formed between the outer container and the furnace wall; the second hot water cavity is respectively communicated with a second water inlet pipe and a second water outlet pipe; a plurality of fire pipes are uniformly arranged in the second hot water cavity; one ends of the fire pipes are communicated with a front smoke chamber, and the other ends of the fire tubes are communicated with a rear smoke chamber; and the tail end of the rear smoke chamber is also provided with a smoke exhaust pipe. The two-temperature hot water boiler has the obvious effects that the device is simple in structure, and is concise in layout; hot water production of two types of temperature points can be realized synchronously by adopting a boiler, also direct heat exchange is adopted, the heat efficiency is high, energy loss is reduced, the production and machining costs are lowered, and the application range is wide.