Abstract: The effects of farming of the sugarcane, cassava, maize planting on the soil erosion and water loss were studied in this test to investigate the impacts of planting of different field crops on the water and soil loss. The results showed that the amounts of the water, soil and soil nutrient loss were significantly different of different field crops, and ranked as follows: maize>cassava>sugarcane. Compared with cassava, the maize’s losses of water, soil, available nitrogen, phosphorus, potassium and organic matter in soil increased by 15.00%, 30.44%, 35.53%, 34.73%, 31.84%, 34.80%, respectively; and compared with sugarcane, the cassava’s losses of water, soil, available nitrogen, phosphorus, potassium and organic matter in soil increased by 41.60% , 39.66%, 46.86%,41.57%, 54.75%, 41.89%, respectively. Thus, there were significant differences in the effects of different kinds of cultivated crops and the management process on the soil erosion. The farmland soil and water erosion amount of maize cultivation was the largest, the second was cassava and the third was sugar cane. Appropriate crop rotation, especially in slope upland is not only good for the adjustment of soil fertility but also for the conservation of soil and water.