Soil and water conservation in construction programs becomes more and more important in local economic development and "China western development". Soil erosion from construction in the hilly area of purple soil is very serious with erosion modulus from 13 895 to 52 400 t/(km~2a) for loose construction deposits, which is much higher than that in contrast grassland. Soil erosion of loose construction deposit has special time dependant effects. Native-born liana and herbaceousplant should be chosen for soil and water conservation in loose construction deposit land.