Excavators, also known as excavating machinery, also known as excavators, are machines that excavate materials above or below the receiving surface with buckets and load them into transport vehicles or unloaded to the stockyard.

Excavators excavation of the material is mainly soil, coal, sediment and pre-loose soil and rock. From the development of construction machinery in recent years, the development of excavators is relatively fast, excavators have become one of the most important construction machinery in construction. Excavator the most important three parameters: operating weight (quality), engine power and bucket bucket capacity.