Semi-solid forming is an advanced metal forming technology and process,which has broad application prospects in the field of aluminum alloy automotive parts manufacturing.First,the basic principles,technical characteristics and comparison with traditional casting processes,the role of semi-solid forming technology in energy saving,increasing production efficiency and improving parts performance is analyzed.Secondly,it focuses on the application examples of semi-solid forming technology in the manufacturing of automobile key parts such as hub,steering knuckles and control arms,and explains the process parameter optimization and quality control measures of this technology.Finally,the development trends and challenges of semi-solid forming technology in the field of aluminum alloy automotive parts manufacturing are prospected.