Large-scale construction excavators have become the core equipment for earthwork engineering, mining and infrastructure construction by virtue of high-power power system and high-intensity working devices. It is equipped with a large-volume bucket, which greatly improves the working efficiency; The heavy-duty hydraulic system is equipped with fast response and sufficient thrust, which can easily crush hard rock strata and carry heavy materials. Its stable chassis design is suitable for complex working conditions, with strong climbing ability and high working stability.