Gas-fired boiler with waste gas treatment function

The utility model relates to the technical field of gas-fired boilers, in particular to a gas-fired boiler with a waste gas treatment function, which comprises a box body, the top of the box body is communicated with a smoke inlet pipe, the rear side of the box body is communicated with a water inlet pipe, the bottom of the smoke inlet pipe extends to the bottom of an inner cavity of the box body, and an L-shaped plate is fixedly mounted on the rear side of the box body. And the front side of the box body is movably connected with a box door through a hinge. According to the gas-fired boiler with the waste gas treatment function, by arranging the liquid purification box, large-particle dust in waste gas can be sprayed and purified, the overall purification effect is improved, and the situation that the overall purification speed is affected due to the fact that the waste gas purification speed is too low only through a filter screen is avoided; and the waste gas is concentrated at the bottom of the high-press