Abstract: The federal government of United States will manage the risk of farm production and farm business through a range of support programs, which are collectively known as the farm safety net including commodity programs mainly for the market risk, crop insurance programs mainly for the natural risk and agricultural disaster assistance programs for the risk not covered by the above two plans. 2014 United States farm bill adjusted the content and structure of the farm safety net, trying to build an organic combination among commodity programs ,crop insurance programs and agricultural disaster assistance programs, focus on subsidies efficiency and strengthen risk management. The new farm safety net could make AMS no more against American reduction commitments, increase American potential range of agricultural products trade disputes, and reduce the willingness of the USA to cut “yellow box policy” subsidies in the new WTO agreement, which have an important impact on world trade of agricultural products. The new farm safety net will aggravate the pressure of imports of agricultural products for China, and have the following enlightenment to agricultural subsidy policy reform of China: continue to intensify protection of support; adhere to the market-oriented reform direction; improve the agricultural insurance system.