Abstract:Most current researches are analyzing science and technology plan projects from a macroscopic perspective and there is little document about researches on the performance of the national science and technology support programs in agriculture field according to the assessment classification principal. Based on data related to the national science and technology support programs in agriculture field during the 11th five year plan period, the paper has analyzed the factors affecting the performance of national science and technology support programs in agriculture field by using principal components analytic method, and concluded that getting patent license, breeding new varieties as well as generating incomes from scientific and technological achievements transferring are the existing weak points affecting the performance of national science and technology support programs in agriculture field. In the end, the paper puts forward some effective improvement measures for the existing problems.