Boiler waste heat utilization water heater

The invention relates to the field of waste heat utilization, in particular to a boiler waste heat utilization water heater. The boiler waste heat utilization water heater comprises a hopper, a smokeinlet, a water feeding mechanism, first water valves, water pipes, a water box, supporting frames, a box body, a water drainage mechanism, water drainage pipes, second water valves, temperature gauges, a supporting mechanism, supporting rods, a supporting plate, heating mechanisms, first water heating boxes, second water heating boxes, a blocking mechanism, a first fixing plate, a baffle, a secondfixing plate, a smoke outlet and a sealing mechanism. According to the boiler waste heat utilization water heater, the side walls of the two ends of the box body are provided with the smoke inlet andthe smoke outlet correspondingly, the heating mechanisms distributed in a staggered mode are installed in the box body, waste gas enters the box body to make sufficient contact with the heating mechanisms, and thus, heat in th