A sawing machine comprises a base support, an X-axis mechanism, a Z-axis mechanism, a Y-axis mechanism, a rotary shaft mechanism and an outer cover mechanism, wherein the base support comprises a machine base, an installation base, a support and a cross beam; the X-axis mechanism comprises an X-axis motor installation base, a motor, a synchronous pulley, a synchronous belt, a lead screw, guide rails, a sliding table and a lead screw nut; the Z-axis mechanism comprises a Z-axis motor base, a motor, a synchronous pulley, a lead screw nut, guide rails, a lead screw, a sliding table, a bearing pedestal, a balancing chain and a balancing weight; the Y-axis mechanism comprises a Y-axis motor, a synchronous pulley, a synchronous belt, guide rails, a sliding table, a lead screw nut, a lead screw and a saw web assembly; the rotary shaft assembly comprises a rotary motor, a rotary disc, a tool table and a rotation compression air cylinder. The sawing machine is convenient to use, safe, reliable, high in cutting efficiency, simple in structure and low in manufacturing cost.