In recent years, the real estate industry is booming, the industry chain of real estate industry is very complex. On the one hand, it led to the development of many industries, on the other hand, high prices also affect the national economy and the people's livelihood. By using the input-output model, this paper analyzes the impact of the real estate industry on the forward and backward industries quantitatively. The study found that the real estate industry and financial industry has a high industrial relevancy. So, the key to the healthy development of real estate industry is handle the relationship between real estate and finance correctly. In addition, the driving effect of real estate industry to manufacturing industry is the most obvious, however, the driving effect of real estate industry to service industry is not obvious, which shows that China's real estate industry should strengthen the industry association with service industry, to promote industrial restructuring and upgrading.