Based on the concept of platform economy，this chapter defines the scope of new industries，new formats and new models related to the platform economy according to relevant national documents. From two development trends of platform economy -integrated platform and vertical platform，we select the representative platform economy enterprises such as Apple，Google，Alibaba and Baidu to analyze their development status and successful experience. The research shows that the United States is still the country with the most rapid economic development in the platform，China enjoys certain advantages in economic development of the platform and is the world leader in the fields of electricity supplier，search，social networking and games. The United States is still the country with the highest development level in the development of industrial internet platform，Germany has the world’s leading advantage in expanding the universality of the industrial base and China has potential advantages in the internet ecology. The countries that have a good internet foundation and an information technology environment have the conditions for developing a platform economy. The typical characteristics of the successful platform economy companies are as follows：having competitive internet technology，the ability to build a foundation platform，access to vast information flows，and customer centricity. At present，the platform economy is showing a trend of multilateral opening up，scale-up，service-oriented and new-economy mode，and there are some problems in the protection of consumers’ rights and interests，the taxation of the platform economy and the monopoly of the industry.