Excavators, also known as excavating machines, are also known as excavators. They are used to excavate materials above or below the surface of the carrier and are loaded into the earth moving machinery of the transport vehicle or unloaded to the stockyard. The materials excavated by the excavator are mainly soil, coal, sediment and pre-pulled soil and rock. From the development of construction machinery in recent years, the development of excavators is relatively fast, and excavators have become one of the most important construction machinery in engineering construction. The three most important parameters of the excavator: operating weight (mass), engine power and bucket capacity.