[Objective] The effects of polyacrylamide(PAM) on the migration and leaching loss of nitrogen, phosphorus and potassium in sandy soil were investigated to provide a more accurate scientific basis about how PAM acts in the migration and leaching loss of soil nutrient and for the improvement of water and fertilizer use efficiency.[Methods] A laboratory soil column experiment was conducted in the study. Four PAM application rates, 0.02%, 0.05%, 0.1% and 0.2% were tested against the control of containing no PAM.[Results] PAM effectively reduced the nitrogen leaching loss in soil. The leachate soluble N concentration was reduced by 28.8%~45.5% in comparison with the value of the control. The effectiveness of this action increased with the increasing rate of applied PAM. PAM clogged the natural flow path of soil solutions and therefore restrained nitrogen migration. PAM enhanced nitric absorption and immobility in the soil. The N concentration increased by 135.2%~285.7% when compared with the control value. PAM effectively reduced the potassium leaching loss in soil. The leachate soluble K concentration was reduced by 33.2%~51.8% in comparison with control value. PAM clogged the natural flow path of soil solutions, and therefore restrained potassium migration. PAM enhanced potassium absorption and its immobility in the soil. The K concentration increased by 42.5%~65.7% in comparison with the control value. The effectiveness of this action was increased with the increasing application rate of PAM. The 0.1% PAM treatment generated better results than those of others. In contrast, PAM did not reduce leachate soluble P concentration in comparison with the control. PAM affected both the phosphorus absorption and the immobility in the soil and the P concentration was decreased by 1.4%~14.3% in comparison with the control.[Conclusion] PAM effectively reduced the nitrogen and potassium leaching loss, and restrained nitrogen and potassium migration in soil. The effect of PAM on the reducing of phosphorus leaching loss was not observed.