It is a flexible fence based on steel wire ring mesh, grating mesh, steel posts, discharging buckles, pressure reducing rings and other components. Set at a certain position on the slope, used to intercept the rolling stone (or falling object) on the slope to avoid its damage to the object of protection, so also called rock fence, when set in the mudflow area, it is convenient to form a flexible fence to intercept the solid large particles in the mudflow body.