The utility model discloses a bull laser cutting device, including rack rail, longitudinal movement frame, sliding block, laser element and control system, rack rail is the fixed component, and the longitudinal movement frame is installed on rack rail, can be followed rack rail and is sliding in vertical direction, longitudinal movement frame is including a plurality of crossbeams, and integrativestructure is constituteed through rigid connection to a plurality of crossbeams, the sliding block installs on the crossbeam, and the length direction of crossbeam can follow and on slide, laser element installs on the sliding block, can follow the sliding block and is sliding in the direction from top to bottom, laser element can segment synchronizing cutting according to the outline of work piece to the sheet material under control system's control. The utility model discloses under control system's control, shorten every laser element's cutting path and time, and then shortened the time ofcutting out the work piece from the sheet material, finally improved the technological productivity ratio of laser cutting blanking.