Abstract: Through the potato field ＂3414＂ test results and measurements of soil nitrogen, phosphorus and potassium soil analysis, established the nitrogen, phosphorus, potassic fertilizer effect function, abundant nutrient deficiency index, comprehensive effect function, the best fertilizer rate under different nutrient abundance of indicators as well as the determination of soil nutrient value, frequency distribution, thus the determination of formula fertilizer application, the calculation formula and fertilizer recommendations.