It is a flexible fence based on steel wire ring mesh, grating mesh, steel posts, pressure reducing rings and other components. It is set at a certain position on the slope to intercept rolling stones (or falling objects) on the slope in order to prevent them from damaging the object of protection, so it is also called rock barrier fence. When it is set in the mudflow area, it is convenient to form a flexible fence to intercept large solid particles in the mudflow body.