Auxiliary combustion device of boiler

The utility model relates to the technical field of boiler auxiliary combustion, and discloses a boiler auxiliary combustion device which comprises a boiler body, a combustion cavity is formed in the bottom of an inner cavity of the boiler body, a waste discharge cavity is formed in the boiler body and located below the combustion cavity, and an ash discharge drawer is arranged between the combustion cavity and the waste discharge cavity. An auxiliary combustion assembly is arranged between the boiler body and the ash discharging drawer and comprises a movable rod, a connecting block, a connecting rod, a movable sleeve and a swing rod. According to the boiler auxiliary combustion device, through the design of the auxiliary combustion assembly, after combustion and ignition, a servo motor is operated to drive a swing rod to operate, an ash discharging drawer is stressed to oscillate under the pulling force of a connecting block, ash on the ash discharging drawer is discharged through oscillation, and the ash s