The application of die casting technology in the automotive industry and its key role in achieving lightweight and improv-ing production efficiency were reviewed.The application of integrated die casting technology on aluminium alloy materials can pro-mote the green transformation of automobile industry.The common defects(gas cavity,shrinkage cavity,etc.)in die casting process and their optimization methods were comprehensively analyzed,and the corresponding optimization strategies were put forward.It aims to provide some help for the future development of die casting technology,in order to achieve the goal of improving casting qual-ity,reducing production costs and achieving sustainable development.