According to the data from the investigation of vegetation with soil and water conservation supervise measures, this paper discusses the roles of self-recovering vegetation in development and construction projects and probes into the effects of self-recovering vegetation on the evaluation indexes of soil and water conservation.The results obtained indicate that if surface soil is well preserved, surface vegetation self-recovering accounting for nearly one-fourths afforestation area can be gained in the abundant rainfall area.De- pending on self-recovering vegetation on disturbed ground in the abu ndant rainfall area, primary vegetation coverage degree can reach more than 50% within 2 years.Owing to serious vegetation damage, shrubbery vegetation can not be completely recovered wit hin 2 years and self-recovering vegetation on disturbed ground is generally the herbage communities.