An experiment was conducted on plots of 10 degree slope at the teaching and experiment farm in Yunnan Agricultural University in 2005-2006. The effect of maize intercropped with vegetables and pasture on runoff and sediment was investigated. The result show that the soil and water conservation function of maize intercropping was better than monoculture of maize. Compared with monoculture maize, the runoff and sediment of intercropped maize have been reduced by 24. 4%~ 34. 1% and 13. 0% ~ 50. 9% in 2005, 8. 5%~ 55. 3% and 32. 5%~ 85. 3% in 2006, respectively. Maize intercropped with pasture had the best soil and water conservation effect, followed by maize intercropping with potatoes and cabbages. A significantly positive correlation had been identified between runoff and sediment with rainfall intensity and erodibility.