At present, the domestic car ownership is huge, and consumers' demand for personalized cars is becoming increasingly strong. In order to enhance brand value and expand new profit points, car companies have also accelerated the layout of customized modification business, further promoting the landing of customized modified vehicle models. This article analyzes the competitive landscape of the automotive customization and modification industry in the customization and modification market, and conducts in-depth research on the development strategies and business models of key automotive companies' customization and modification.