With the continuous development of offshore oil industry, offshore oil platforms, jackets, etc. are all developing towards large-scale development. Therefore, higher requirements are put forward for the offshore lifting construction of such super-large and super-heavy steel structures. It has ensured that the type of sea is changed, and the company's advantage in the lifting of heavy pieces has been improved. In compliance with the requirements of market development, Huaxi Offshore independently invested in the construction of a 5,000-ton full-slewing crane engineering ship.