The optimization pattern of afforesative techniques with collecting runoff with collecting runoff to drough-resistance was presented by using L9（34）plan in the orthogonal experiments.It has shown that the order of four factors contributed to afforestative species(A)>cover material in the planted pits (D)>collection area of runoff for each tree(B)land preparation for afforestation(C).Of all factor

the order of the same kind is as follow;for A

Robinia pseudoacaia L.>Ulmus Pumila>Plalycladus arientalis Franco;For D

film>foam matcial>straw;for B

2.5m2>2.0m2>1.5m2;and for C

reverse slope terrace>level furrom>fish-scale pits.In semiarid loess hilly areas

the optimization pattern of afforestative techniques with collecting runoff to drough-resistance is A

D

B

C

Namely

afforeatative species is Rohinia Pseudoacacia L;the cover material of planted pits is film

the collectiom area of runoff for each tree is 2.5m2

and the land preparation pattern for afforestation is reverse slope terrace.