In 1951, the first hydraulic backhoe excavator was launched at the Poclain plant in France, creating a new space in the field of excavator technology development. In the early and mid-1950s, drag-type full rotation was developed. Hydraulic excavator and crawler type hydraulic excavator.
The initial trial hydraulic excavator was based on the hydraulic technology of aircraft and machine tools. It lacked hydraulic components suitable for excavator's various working conditions. The manufacturing quality was not stable enough and the parts were not complete. Since the 1960s, hydraulic excavators have entered the stage of promotion and flourishing, excavator manufacturers and varieties have increased rapidly, and production has soared. Between 1968 and 1970, hydraulic excavator production accounted for 83% of the total excavator production, which was close to 100%.