Abstract:The effects of spraying technics,water supply and soil texture on the developing and growth of vegetation are studied quantitatively. The results show:(1) the germination rate,late growth height and the maximal contraction rate decrease with spraying press increasing,while increasing with supply water increasing;(2) shearing resistance and resilience rate of substrate increase with spray press increasing,while decreasing with water supply increasing;and (3) spray press,water supply and soil texture are not notably for erosion. The variety of several treatment sediment yield of substrate exceeds 5%. In the same technical condition,germination rate,late growth height and the maximal contraction rate,shearing resistance and resilience rate of substrate vary with different soil texture. Germination rate,late growth height and the maximal contraction rate,shearing resistance and resilience rate of substrate are selected as integrated evaluation indexes. Then the effect model of spray construction is founded. The studies can provide theories to eco-engineering for rock slope protection.