Digital publishing industry in the cities of Beijing, Tianjin, Shanghai and Chongqing has been developed for almost decade. On the one hand, big progress is achieved in technological innovation, business form cultivation and profit model with the optimization of digital publishing industry market environment; on the other hand, the industry is in a difficult position restricting the fast growth of regional economy. In order to reasonably apply the experience and strategy in digital publishing industry development, this paper makes a comparative study of digital publishing investment and financing policy in three dimensions of financial system design, policybased financial institution function and business optimization, policybased financial products difference.