The invention discloses a cloth pressing roller lifting mechanism for an automatic loading device of a laser cutting machine. The mechanism comprises a conveying net belt, a cloth pressing roller, a cloth pressing roller stop base, a cloth pressing roller lifting support, connecting rods, a connecting rod fixing base, a support rod, a pressing rod, a pressing rod fixing base and a pressing rod stop base, and is characterized in that the cloth pressing roller is positioned above one side of the conveying net belt; two ends of the cloth pressing roller are respectively connected with the upper part of the cloth pressing roller lifting support through bearings; the cloth pressing roller lifting support can drive the cloth pressing roller to move up and down in a groove of the cloth pressing roller stop base; the cloth pressing roller can rotate along self axis under support of the bearings; and one ends of two connecting rods are respectively hinged to the lower part of the cloth pressing roller lifting support, and the other ends of the two connecting rods are twisted through the support rod. The cloth pressing roller lifting mechanism for the automatic loading device of the laser cutting machine is convenient to operate, and one person can quickly replace cloth by using the cloth pressing roller lifting mechanism, so that the production efficiency is improved, the labor cost is reduced, and the time is saved.