Abstract: The combination of planting and breeding is an effective way to realize the virtuous circular development of regional ecological agricultural system. Fujian Province continues to promote the construction of ecological agriculture in accordance with the ecological concept of combining agriculture and animal husbandry, planting and breeding and circular development. By taking the nitrogen demand of the main crop harvests and the nitrogen qrom livestock and poultry industry in Fujian Province in 2018 as the research object, the problem of nitrogen balance in the planting and breeding industry in the province was explored. According to the preliminary calculations, in 2018, the nitrogen load of livestock and poultry per unit of cultivated land in Fujian Province was 95.08 kg·hm^-2, among which Longyan City, Nanping City, Xiamen City and Zhangzhou City exceeded the provincial average; the nitrogen demand per unit of cultivated land in the province was 161.10 kg·hm^-2, among which Zhangzhou City, Fuzhou City, Sanming City and Xiamen City exceeded the provincial average. The risk value of carrying capacity of livestock manure in the whole province was 0.62, showing that the overall risk of pollution was not high, but there were some environmental pollution problems from a local perspective.