The invention discloses a device for heating and humidifying a workshop by using waste water from a factory. The device comprises a support base plate, a tank support seat, a hot water outlet pipe, a water storage tank, an air filter device, an exhaust pipe, and a driving motor. , sewage solenoid valve, sewage filter tank, sewage pipe, electric control box, waste hot water regulating valve, waste water hot water inlet pipe, air filter device consists of air outlet, fine filter, adsorption filter layer, coarse filter, air inlet The protective shell is fixed on the left side of the exhaust pipe by bolts. The invention realizes the device for heating and humidifying the workshop by using the waste water from the factory. By installing an air filter device, the waste water from the factory can be used to heat the workshop. The warm and humidifying device can effectively filter the filtered waste hot water air when in use, avoiding the gas that is harmful to human health in the air from entering the factory workshop and affecting the health of workers, and effectively improving the safety of the device.