Bun steel mesh network structure: the wire rope or ring network (when required * small rockfall additional layer of wire grill), fixed system (anchor, anchor rope bar, dock and support rope), pressure ring and steel four main parts constituting the column. Bun nets with high flexibility, high protection strength, easy spreading. Adapt to any terrain slope, the installer standardized and systematic. Applies to prevent the mountain close to building facilities next to the slope due to weathering, using the cover fixed to make the hillside into a solid overall, to prevent disasters caused by mountain talc. Products using high-strength galvanized steel wire rope, steel wire, not less than embalmed AB class, its antiseptic life in general, depending on environmental conditions up to 30-50 years. The main slope instability, potential expansion from falling rocks to prevent and treat dangerous slope to criss ф16 support rope, according to slope shape (4.5X4.5m or 4.8X4.8m) arranged in a square pattern counter, and in The main 4X4m pre Mobility suture tensioning rope, so that the system is subjected to a certain direction slope preload pressure, thereby increasing the stability of dangerous rock mass, prevent rockfall occurred, but the system does not affect the normal groundwater excretion, and to ecological management slope provides a prerequisite. Suitable for building facilities near the buffer zone of high mountains, the rock fall, flying rocks, avalanches, mudslides * In addition to building facilities to avoid disaster destroyed the building facilities.