[Objective] For solving the problems of drought and nutrients loss caused by soil erosion, a series of studies on water and fertilizer saving were conducted in order to expound the effects of water pad on fertilizer and water saving and its application prospect.[Methods] Compared to the conventional method of mixing water absorbing polymer (WAP) with soils, WAP was used to make water pad to obtain a better water and fertilizer saving effect.[Results] Under the same watering condition, the application of water pad could reduce water loss by 65%, and reduce nitrogen, phosphorus and potassium nutrients loss by more than 89%. Pot experiment showed that under drought stress condition, the application of water pad could increase corn yield by 155%. Field experiment showed that under natural rainfall condition, the application of water pad could increase corn yield by 26%, and increase sugarcane yield by 10.5%, and the sugar degree increaed. In addition, with the application of water pad, nitrogen, phosphorus and potassium nutrients loss decreased, while nutrients absorption increased.[Conclusion] A serial of experiments indicate that water pad can increase crop yields, quality and nutrient uptake.