Cutting principles of high-power single-CO2-laser cutting and low-power dual-CO2-laser cutting are discussed. Non-metallic materials such as wood die-boards are cut by using these two laser cutting techniques. The dependences of cutting depth and seam shape on laser power and cutting speed are analyzed. The results show that cutting wood die-boards with low-power dual-CO2-laser cutting has many advantages over high-power single-laser-head cutting in the manufacturing costs, operating costs, cutting precision and seam shape.