Excavating machinery, also known as excavator, is an earth-moving machine that uses a bucket to excavate materials above or below the bearing surface and load it into a transport vehicle or unload it to a stockyard. The materials excavated by the excavator are mainly soil, coal, silt and soil and rocks after pre-loose. From the perspective of 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 an excavator: operating weight (mass), engine power and bucket capacity. Excavator, invented in the 1870s, according to the driving mode, divided into internal combustion-driven excavators and electric-driven excavators. According to the walking mode, they were divided into crawler excavators and wheeled excavators. According to the transmission mode, they were divided into hydraulic excavators and machinery. Excavators are divided into shovel excavators, backhoe excavators, alias excavators, excavators, and backhoe excavators according to the bucket.