The invention relates to the technical field of packaging and discloses a packaging method for a bathroom cabinet. The packaging method comprises the following steps: (1) a paper box is artificially opened, conveyed to a paper box bottoming machine to be bottomed through a first conveying line and conveyed to the bottom of a sucking and lifting machine through a second conveying line after being bottomed, and footing foams are put into the paper box when the paper box is placed on the second conveying line; (2) a qualified bathroom cabinet is conveyed to a film twining machine to be twinned with a film through a third conveying line, is conveyed to the lower side of the sucking and lifting machine through a fourth conveying line after being twinned with the film, is clamped by the sucking and lifting machine and raises to a certain height, at the moment, the paper box in the first step is conveyed to the bottom of the bathroom cabinet, and the bathroom cabinet is put into the paper box by the sucking and lifting machine; and (3) the paper box containing the bathroom cabinet is conveyed to the paper box capping machine to be capped through a fifth conveying line, and top foams and accessories are sequentially put into the paper box when the paper box is placed on the fifth conveying line. The packaging method can realize streamlined operation, basically realizes automation, greatly improves the working efficiency and reduces dependence on manpower.