As the demand for intelligent and flexible production in the automotive manufacturing industry continues to intensify, industrial automation enterprises are gaining ever-greater market opportunities and competitive advantages in this field. Based on a literature review and representative case studies, this paper constructs a theoretical framework for growth strategies and systematically analyzes the current application status and growth paths of automation enterprises in both complete vehicle and component production. The research finds that different growth strategies (such as vertical integration, horizontal diversification, and digital service transformation) exhibit varying applicability across upstream and downstream segments of automotive manufacturing, while simultaneously facing challenges related to technology integration, business models, and organizational change. In response to these issues, this paper proposes countermeasures such as optimizing R&D and customer relationship management, improving branding and after-sales service systems, and strengthening policy and industry environment support, thereby offering guidance for sustainable growth of industrial automation enterprises in the automotive manufacturing sector.