Abstract: In order to evaluate the soil and water conservation function of Phyllostachys praecox cv. Prevernalis stands returned from farmland. Based on fuzzy mathematics and multivariate statistical, the soil and water conservation function of Phyllostachys praecox cv. Prevernalis stands returned from farmland under different types had been comprehensive evaluation. The results showed the comprehensive index of soil and water conservation function of Phyllostachys praecox cv. Prevernalis stands returned from farmland granter than farmland. The Phyllostachys praecox cv. Prevernalis stand returned from farmland with proportion of 2:3.5:3.5:1, density of 9000-15000 culms/hm2, organic fertilizer 30000 kg/hm2, compound fertilizer 3000 kg/hm2 and mulching method had the highest comprehensive index of soil and water conservation function. These results could be provide the basis for the regulation of soil and water conservation function of Phyllostachys praecox cv. Prevernalis, and it had important practical significance to promote of soil and water conservation function of Phyllostachys praecox cv. Prevernalis stands returned from farmland.