In order to explore the effects of liquid cow dung and chemical fertilizer application on corn yield, plant nutrient absorption, soil phosphorus leaching and phosphorus profit and loss, a total of 6 treatments were set under field conditions, with N 200 kg · hm-2, P2O5 100 kg · hm-2, K2O 80 kg · hm-2 as the total nutrient input, including no fertilization (CK), conventional fertilizer application (F) by farmers, fertilizer and liquid cow dung application, and different cow dung amounts were set, 30, 60, 90, 120 t · hm-2 (FL30, FL60, FL90, FL120).