Microwave hot water heater

The utility model relates to a microwave hot water heater, which comprises an appearance decorating shell, a heat preserving material layer, an anti-leak layer, a water inlet pipe, a water outlet pipe, a magnetron and an internal bladder. A longitudinal section of the internal bladder forms an inverted concave shape; a convex core cavity in the central part of the internal bladder is provided with the magnetron; an annular body cavity of the internal bladder is provided with water flow circulating baffle plates; the plates stand in the annular body cavity of the internal bladder in uneven height. The utility model is also provided with a metallic internal bladder; the internal bladder is provided with a magnetron shield core housing and the magnetron. The metallic internal bladder is served as a heating container and the anti-leak layer, which is more suitable for a heating internal bladder for a water dispenser. The water heater can realize real separation of water and electricity. The utility model has the advantages of high safety, no scale generation, long service life and energy saving. The effect is good when being applied to a household water dispenser.