The implementation of minimum purchase price policy in China has played an important role in increasing farmers' grain yield, promoting grain production and safeguarding national food security since its implantation. However, there existed certain deficiencies in the later implementation such as a decrease in the role of ensuring farmers' rice planting profits, stagnant rice production, difficulty in eliminating inventory rice, and heavy financial burden and so on. Therefore, it need to continuously improve the floor price policy and stimulate the production of quality rice particularly, which can enable the policy rice to be well purchased, managed and sold, thus controlling the policy rice inventory scale and cutting down the subsidies. And the positivity of the farmers can be protected, while a new balance between rice production and the market operation can be built, which will ultimately make new contributions to food security in China.