Abstract: Ledu District focused on the five key links of "soil testing, formula, fertilizer distribution, fertilizer supply and fertilization guidance", determined 1 476 sample points as cultivated land fertility evaluation points through 11 systematic works including field investigation, and established cultivated land fertility evaluation database and potato suitability evaluation model. According to the potato suitability evaluation results and soil nutrient data, the recommended potato fertilization scheme under different fertility levels was provided to provide scientific theoretical basis for potato scientific and rational fertilization in Ledu District.