With the progress of human society, the development and application of digital technology make the data become new production element, and the establishment and perfection of digitalized improvement mechanism and platform mechanism further boost the data to become the key production element. The evolution of productivity element order makes digital productivity become modern advanced productivity and bring the improvement of production method (economic development pattern) and further produce new economic form, digital economy. Digitalized reform mechanism and platform mechanism are the basis for digital economy to operate, based on this, the produced accelerating mechanism and generalized system of preference are the advantage of the digital economy. Under the action of these unique mechanisms, the digital economy presents the characteristics of sharing instantaneity, infinite index, diversity and dispersion, and cross-border equilibrium, which are different from the traditional economic theory. The digital economy brings the shock and challenge to traditional economic theory while promoting social productivity level, accelerating economic growth and accumulating wealth. As a socialist country, China should not only make use of the digitalized reform mechanism and platform mechanism to strengthen the accelerating mechanism, infinite index, diversity and accuracy of the digital economy to take the opportunity to develop the digital economy, to realize great-leap-forward development and to meet the demand of the Chinese people for better life, but also take the advantage of generalized system of preference, sharing instantaneity and cross-border equilibrium of the digital economy to intensify top design, to set up sharing platform, to realize inclusion growth and coordinated development and to make efforts for common richness.