Hydraulic swing beam shearing machine, sheaer, 1. Possessing a speed blades gap adjusting device, permit to adjust steplessly the blades gap. 2. E20 digital system has a high ratio of performance/price. 3. Backgauge being driven by inverter motor, positioning rapid and correct. 4. Aligning by light, helpful to mark out by hand for shearing. 5. Reliable safety guards.