Waste gas catalytic combustion device

The utility model relates to a waste gas catalytic combustion device which comprises a box body, a partition plate is fixedly arranged on the inner wall of the box body, a combustion chamber is arranged at the lower end of the partition plate, an air inlet pipe is arranged on the outer wall of the box body, the air inlet pipe is communicated with the combustion chamber, an inserting hole is formed in the upper end face of the air inlet pipe, and a filter plate is arranged in the inserting hole. Sealing blocks are arranged on the upper end face of the filter plate and located on the two sides, sealing grooves are formed in the two sides of the inserting hole and located in the air inlet pipe, the sealing blocks are located in the sealing grooves and fixedly installed with the inner walls of the sealing grooves through bolts, a movable plate is arranged on the front end face of the filter plate, and a brush is arranged on the inner wall of the movable plate. The brush is in contact with the filter plate, so tha