The invention discloses an industrial hot water boiler. The industrial hot water boiler comprises a furnace body, a heating cavity, a furnace door, a fire grate and a fan; the heating cavity is formed in a heating chamber; an arc top plate is arranged at the top of the heating cavity; multiple first heat dissipating pieces are uniformly distributed on the outer side wall of the arc top plate; an inclined liquid guide plate is fixed at the middle part of the heating cavity; the liquid guide plate consists of a plate body, a convex edge and a ventilation hole; the side wall of the heating cavity communicates with a hot water tank; the liquid guide plate extends into the hot water tank; the top of the hot water tank communicates with a steam exhaust pipe; and multiple second heat dissipating pieces are arranged on the side wall of a smoke discharge pipe. The industrial hot water boiler heats water in the heating cavity through fuels, provides different heat mediums for industrial production, directly exhausts used high-temperature steam through the steam exhaust pipe, and condenses hot water through the arc top plate when the hot water needs to be used; and meanwhile, the hot water contains no sediments and the like to prevent scales generated in a conveying pipe.