The maximum absorptive capacity of peanut land on pig-manure in subtropical areas was determined through field plot experiments, which were carried out at the background of natural rainfall and different fertilization level of pig-manure. Results showed that the peanut land could effectively absorb pig manure. Treatment of 9 903 kg/hm2 pig manure utilization (CP2 level) could gain the best result on the consideration of ecological and economic benefits. The peanut yield would decrease when fertilizing amount was lower than this level. However, yield did not increase remarkably when the fertilization was higher than the level. Above this fertilization level, the higher the pig manure fertilized, the lower its utilization rate would be, which would result in higher nutrient loss and increase the risk of secondary pollution to environment. One hectare peanut land could bear 30.56 pigs at most every season.