The cutting length is controlled by a fully closed-loop CNC system. A fully closed-loop CNC system automatic feeding device is used. Automatic conversion of 45 to 90 degrees. At one time can cut 6 60mm width of less than the profile, processing range is large, can be sawn 260mm width profile. The whole machine has good structural performance, high speed, high precision and high efficiency. Suitable for large and medium-sized door and window processing enterprises continuous production