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With the continuous development of high speed railway in our country, high speed rail slope protection and greening action is critical.Embankment slope protection adopts traditional engineering protection technique,which destroyed the original plant covering layer, and against environmental protection and ecological balance, so plants of slope protection and greening gradually become mainstream research. Plants of slope protection for plants choice is the top priority, so plants screening and configuration became the current research hot spot.To not only ensure the expectation of the Chengguan high speed railway is comp-letely fulfilled,but also for the future development of the eco-highspeed railways to benefit from the scientific proven theories.In this paper,based on the reconstruction projeet of Chengguan high speed railway and using the methods of fieldinvestigation, analysis in the industry in the slope vegetation restoration technique and allocation of plant to study.Its main conclusions are as follow:(1)Through to the Sichuan region along the way into irrigation plants such as investigation, using analytic hierarchy process, In Sichuan province were summarized the influence of slope protection plant choose factor sequence; SPSS software, cluster analysis to the investigation of plant species, a comprehensive rank evaluation can be selected antifonding grass, irrigation, cane, tall trees.There are Amorpha fruticosa L. Robinia pseudoacacia L,Hippophae rhamnoides Linn.,Camellia japomica,Coriaria sinica Maxim.,Caragana sinica,R. chinensis,Magnolia multiflora M. C. Wang et C., Rosa multiflora, Gardenia jasminoides, Pyracantha fortuneana for shrub etc; Paspalum natatu,Cynodondactylon(Linn.)Pers.,Iris dichotoma Pall,Dendranthema indicum (L) Des Moul.,Festuca arundinacea,Bromus inermis Leyss,LoliumperenneL.,Trifolium repens, Medicago sativa L., Melilotus suaveolens Ledeb.,Eragrostis sp.s,Digitaria sanguinalis(L.)Scop.,Trifolium hybridum,Festuca rubra L.,Astragalus adsurgens Pall.,Orychragmus violaceus O.E.Schulz, Dianthus chinensis, Cosmos bipinnatus Cav. for grass;Parthenocissus tricuspidata(S.Et Z.)Planch Pueraria lobata.,Caulis Mucunae and Akebia trifoliate for liana.Pinusmssoniana and Cinnamomum camphora (L.) Presl. for trees.(2)With the help of SPSS software of X2 test and the coefficient relational of deter-mination,at the basis of studying interspecific association of 35 plants, seientific disposal between two trees are suggested;Summarizes positively related to 167 to landscaping configuration combination,the results showed:Cynodon dactylon L.--Lolium perenneL., Cynodon dactylon L.--Bromus inermis Leyss.Trifolium hybridum--Amorpha fruticosa L.,Festuca arundinacea--Eragrostis curvula,Trifolium repens-Eragrostis curvula, Trifolium repens--Trifolium repens,Trifolium repens--Melilotus officinalis(Linn.)Pall., Gardenia jasminoides--Rosa multiflora to between eight Jaccard index is opposite bigger,plant species is a significant correlation between,between species and the combination of a variety of combination between relative to other better.Finally,and with a number of roads in Sichuan Plant slope protection a simple combination of comparison, given the high-speed railway slope protection and greening of the plant selection and the best ratio.(3)The paper dissertate the action of high speed railway slop plant protection by the analysis if slope destruction on the theory.The Paper verify the action of slope plant protection by the use of hydraulies and sediment corrosion theory.The paper bring forward the way of mechanics calculation about side slope.
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