The wave of digital economy is sweeping the world. How to realize the transformation and development of automobile enterprises in the context of digital economy has become the core issue at present. Based on the preliminary exploration of the concept，characteristics，infrastructure and development factors of the digital economy，this study proposes the core tasks of developing the platform economy of automobile enterprises，and establishes a big data platform and formulates a comprehensive plan of “three horizontals and four verticals”. The two major development points have been systematically sorted out，aiming at exploring the feasible way for the development of digital economy of automobile enterprises by building a platform economy of automobile enterprises with perfect functions and rich in innovation.