【Objective】As livestock and poultry droppings are rich in nutrients, such as nitrogen, phosphorus, potassium, etc., they are often used as organic manure in farmland fertilization. However, excessive application of the organic manure may lead to accumulation of nitrogen and phosphorus in the soil and consequently leaching of N and P from the soil with rainfall into water bodies, causing serious pollution of surface water and groundwater. In order to rationalize the scale of livestock feeding, effectively reduce pollution from the livestock and poultry feeding industry in Xinhui District, Jiangmen City and ensure healthy and sustainable development of the industryc, it is necessary to study current status of soil N and P in the farmlands and figure out how much livestock and poultry manure the farmlands demand 【Method】 A total of 35 soil samples were collected from paddy fields, vegetable plots, orchards and forest lands, separately, for analysis of N, P, Cu, Zn and As contents with the standard methods. By referring to the “Standard for Grading of Soil Fertility” and “Standard of Soil Environment Quality for Farmlands”, evaluation was done of soil nutrients and heavy metals in the soil relative to soil type in Xinhui Region, Based on the data cited from the “Statistic Yearbook of Xinhui” concerning types, yields and planting areas of the major crops in the region, crop nutrient demand was calculated. Based on the soil test for N and P contents in combination with crop planting areas, soil nutrient supplying capacity was worked out. In the end, Study was performed of rational livestock and poultry feeding scales, using a nutrient balance model. 【Result】All the findings in this study indicate that the soils in Xinhui are quite high in fertility. Among the 35 sampling points, 29 or 82.9% exceeded 1.2 g•kg^-1 in TN. The paddy soils were the highest in TN, reaching up to 2.92 g•kg^-1, and the orchard soils were in TP, reaching up to 3.51 g•kg^-1 in Gujing Town, where all towns, except for Daze Town, had soil N or P surplus, and some farmlands even did both. In addition, As pollution was found in some orchards, which might be attributed to the use of organic-arsenic pesticides in the past. Based on the nutrient balance model, livestock and poultry carrying capacity of Xinhui District was worked out to be 270 985 heads of pig equivalent. However, the current load of livestock and poultry has already reached as high as 1 257 295 heads of pig equivalent. Shuangshui and Siqian are the top two towns in, livestock and poultry carrying capacity, reaching 80 145 and 70 843 heads, respectively, the sum of which accounts for 55.7% of the total of the whole district. On the other hand, the following towns, Huicheng, Sanjiang and Daao, do not have any livestock and poultry carrying capacity. 【Conclusion】 Xinhui District is quite high in soil fertility. For the sake of environmental protection, it is essential to have the whole district adopt the practice of soil-test-based fertilization. Besides, to prevent and control of pollution from the livestock and poultry feeding industry in Xinhui, it is of paramount importance to limit the scale of livestock and poultry breeding and moreover to pay special attention to the risk of potential As pollution of the farmlands, while enlarging the proportion of organic manure in fertilization.