Boiler automatic feeding device and automatic feeding method thereof

The invention discloses a boiler automatic feeding device and an automatic feeding method thereof and belongs to the technical field of boiler feeding. The boiler automatic feeding device comprises a feed hopper, a discharge box with openings in the upper end and the two sides, a discharge hole and a hydraulic device, wherein the hydraulic device is composed of a motor, an electromagnetic valve, a hydraulic box, a travel switch, a hydraulic cylinder and a push rod; the electromagnetic valve is composed of a first electromagnetic valve and a second electromagnetic valve; the travel switch is composed of a first travel switch and a second travel switch; one end of the push rod is connected with the hydraulic cylinder through a piston; the other end of the push rod is arranged in the discharge box; and a push plate used for pushing fuels in the discharge box from the discharge hole into a hearth of a boiler is arranged at the other end part of the push rod. The invention also discloses the feeding method of the