Abstract: Grid parity is an important measure to promote the high-quality development of new energy in China. This paper summarized and combed the current related policies of grid parity in recent years, analyzed the main influencing factors of new energy economics in grid parity period, established the evaluating model based on IRR methodology. Taking wind power, concentrated and distributed PV power in different resource areas as a case study, the economics of new energy in 2020 in grid parity was studied. On the basis, some key issues such as developing scale, distribution, operation dispatch and consumption, market completion, as well as the future developing trend of new energy in China were analyzed in grid parity.