Boiler door with ash trough, featuring a circular door seat and door cover, characterized by a semicircular ash trough fitting inside the circular door seat, with its length corresponding to the diameter of the furnace chamber.Characterized by a circular furnace door seat with a semi-circular ash trough placed inside, whose diameter is connected using round steel bars. The center point of the round steel bar is connected to the center of the furnace door cover with a linkage, with the linkage length ensuring alignment of the fireproofing holes on the furnace door seat with the front end of the semi-circular ash trough fitting against the inner wall of the furnace. This design prevents ash contamination during coal replacement and also addresses the issue of insufficient sealing in coal stoves. It features a simple structure and ease of use.