This paper firstly analyzed legislation of the United States for guaranteeing qualified successors of agriculture, such as Morrill Land Grant College Act. Then, it elaborated policies of the United States for supporting beginning farmers and ranchers. On the basis of analysis, it came up with recommendations for cultivating new professional farmers, including adhering to leading role of government, speeding up legislation of cultivating new professional farmers, combining cultivation and attraction, and strengthening fundamental position of education and training in cultivation of new professional farmers.