Passive protection is (additional layer of wire grille takes intercept small rockfall) by wire rope, ring networks, fixed system (anchor, anchor rope, dock and support rope) pressure ring and steel columns four major parts. Combination of steel columns and steel wire rope connected to form a whole, for the protection of the area to form a protective surface, thereby preventing the collapse of falling rock soil, slope protection play a role. Features passive protection systems: flexible protection and interception system enough strength to absorb and disperse impact energy transfer stone, pressure ring design and the use of the momentum of the system has been further improved. All components of the system using standardized factory production, on-site construction. In addition to infrastructure construction to install as the main anchor a small amount of foreign, mainly for modular installation. So that construction personnel and equipment to reduce installation easy reach, thus shortening the construction period. Passive protection structure configuration: steel columns supporting rope, anchor rope that, stitching wire, vacuum ring passive safety net models: RX-025, RX-050, RX-075 RXI-025, RXI-050, RXI-075 , RXI-100, RXI-150, RXI-200 and the like. Ring network Fence: Features: steel plate with the number of shares to each other to form a ring formed network sockets. Suitable for building facilities near the buffer zone of high mountains, the rock fall, flying rocks, avalanches, mudslides blocked from building facilities to avoid disaster destroyed the building facilities. Its role is to intercept the rockfall protection energy is generally 150kj - 2000kj.