Excavator has developed impressively, and the development of ultra-large excavator is really amazing. Around 1974, Work the first time in the world’s weight of more than 150 tons of ultra-large excavators. After more than 20 years of development, super – Large hydraulic excavator’s work has now passed the maximum weight of 800 tons, and bucket capacity of 50 cubic meters a breakthrough. With its simple structure, easy operation and sports a flexible and easy maintenance, etc., hydraulic excavators and gradually replace the mechanical and electric excavator, and formed a super-large hydraulic excavator series.
     Very large excavator is mainly used for a variety of large-scale open pit mine in mining and large-scale infrastructure construction, while also used in land reclamation works and the harbor channel dredging project, which is being accounted for most of the shovel-type excavator. Head
Pre-production of super large excavator manufacturers, mainly in the United States, Japan, Germany, such as Caterpillar,
Komatsu, Hitachi, Demag, O & K, among others.