Laser printer capable of reducing residual powder in powder box, and powder box

The invention relates to a laser printer capable of fully utilizing carbon powder and a powder box, and relates to the technical field of laser printing. The laser printer comprises a printer main body, a door cover, a telescopic device, a telescopic rod, a top position, the powder box and a control system. The telescopic device is installed on the door cover, and the left side of the telescopic rod is fixedly installed on the telescopic device. The telescopic device controls the telescopic rod to extend outwards or contract towards the telescopic device. When the printer is in a turn-off state or stops printing, the control system controls the telescopic device to contract towards the door cover, and the telescopic rod is located at a shortest position; when a brand-new powder box is placed in a printer, a baffle plate on the powder box is located at an initial position, and the baffle plate on the powder box translates towards the interior of the powder box under the action of the telescopic device along wi