High Speed Rotary shear is an important machine for cutting medium and small coils, thin slab, small steel bar and hot-rolled and cold-rolled coils (including coating), rotary shear can reduce or eliminate the manual cutting process, thereby greatly improving production efficiency and reducing energy consumption. The cutting mode of rotary shear is to cut the bar through the shear head. Compared with manual operation, this way can reduce the process energy consumption and reduce the friction loss and waste between the bars. In the process of working, high speed rotary shear can not only ensure the accurate control of cutting quality and cutting length, but also ensure the personal safety of the operator through the safety protection device, and effectively reduce the production accident rate.