The invention discloses a novel new material product round edge trimming device, and relates to the technical field of material processing. The device comprises a bottom plate, and the right end of the upper side surface of the bottom plate is fixedly connected with a motor. According to the novel new material product round edge trimming device, a first gear, a seventh gear, a second supporting shaft, a second gear, a third gear, a first movable plate, a first connecting shaft, a fourth gear, a second movable plate, a second connecting shaft, a fifth gear, a third connecting shaft, an eighth gear, a fourth connecting shaft, a sixth gear and a first supporting shaft drive a first transmission wheel and a second transmission wheel to reversely and synchronously rotate, then a new material plate penetrates through two rounding cutters at the same time to complete round corner shaping of the edges and corners of the new material, and therefore the problems that most of existing new material product round edge trimming devices do not have a convenient adjusting function, consequently, most of the existing new material product round edge trimming devices can only adapt to wood plates ofcertain widths, and the machining difficulty of workers for machining new material plates of different widths is increased to a certain degree are solved.