Automatic bollard is a kind of automatic lifting bollard powered by hydraulic machine, also known as automatic rising bollard,retractable bollards, mainly used for safety anti-terrorism and access restriction, etc. Bollards are available in a variety of operational configurations and aesthetic appearances to best suit the needs of customers. Automatic lifting bollards are also the main equipment of lifting bollard manufacturers and are generally used in places where landings and takeoffs are more frequent and where there is a certain security force around. For example, parking lots, schools, government and embassy entrances, subways,airports, power plants, gas stations, prisons, banks and other areas that require high-level security.