The invention provides a sheet material edge trimmer with a feeding mechanism and relates to the field of edge trimming equipment. The sheet material edge trimmer comprises a bracket, a vertical slide rail, a slide base, a push rod, a first support, a second support, four cutters, a groove, a hoisting device and a sheet material supporting frame, wherein the vertical slide rail is mounted on the top of the bracket; the slide base is mounted on the slide rail and is connected with a pneumatic device; the first support is provided with a conveyor belt device and is further provided with a transverse slide rail mounted on the first support; the transverse slide rail is slidingly connected with a clamping device and is connected with the pneumatic device; hoisting bases are arranged on the front and back sides of the first support respectively; the cutters are arranged on the hoisting bases; the cutters are arranged on the left and right sides of the second support respectively; and the feeding mechanism mounted on the left side of the bracket is further provided. The sheet material edge trimmer with the feeding mechanism is reasonable in structural design, can be used for efficiently trimming edges and does not hurt people; and after the feeding mechanism is connected, the edge trimming efficiency is greatly improved.