Abstract: As a result of trees afforestation experimentation in upside of hot and arid valley of Jinsha River,Broussonetia papyrifera,Cajanus cajan,Dodonaea viscose,Phyllanthus enblica,Melia toosendan were suitabe trees to plant in an area under a elevation of 1 600 m;Albiza kalkora,Acacia mearnsii,Cupressus lusitanica,Cupressus duclouxiana were suitabe trees at elevation between 1 400 m and 1 700 m,Tamarindus indica,Tephrosia candida,Acacia glauca,Leucaena leucocephala cv. Salvador,Schleichera oleosa,Caesalpinia spinosa were suitable trees under 1 400 m.Direct sowing were adopted to plant C.cajan,D.viscose,T.candida.For A.kalkora,A.mearnsii,M.toosendan,A.glauca,L.leucocephala cv. Salvador,S.oleosa,and C.spinosa,100-days-old containerized seedlings were used for afforestation,for T.indica,C.lusitanica,C.duclouxiana,and C.spinosa,1-year-old containerized seedlings had better effect in afforestation.The silvicultural technique included site preparation in blocks (40 m×40 m×40 cm),application of organic manure with N and P fertilizer as basal fertilizer,and planting the trees at the beginning of rainy season.Strong,big and well lignified seedlings should be used in afforestation.It was important to remove weeds during afforestation and rainy season.