Bridge type grab ship unloader is mainly used for unloading bulk materials from ship in bulk cargo ports and terminal. It can also convey bulk materials with different densities and particle sizes, such as sand, limestone, cement, coal, grain and etc. It is mostly port machine to load and unload bulk cargo in the terminal with the advantages such as maturation, reliability, strong adaptability to different ship types and cargo types, high productivity, high degree of automation, low failure rate and convenient maintenance.