In order to understand the effects of slope aspect and human disturbances on the diversity and community regeneration,field and laboratory analyses were conducted on Pinus tabulaeformis artificial forest in loess hilly region.The results showed that the community similarity coefficient of undergrowth was 74%,74% and 38% between shady and sunny slopes,between the natural and litter removed conditions,and between natural and timbered conditions,respectively.The indices of richness(R),Shannon-Wiener(H),and Simpson(D) of the shrub layer on the shady slopes were larger,while Pielou(J) in the shady was smaller than those on the sunny slopes.For herbaceous layer,R,H,D and J on the shady slopes were larger than those on the sunny slopes.The values of R,H and D in shrub layer were the highest under litter removed condition,then followed by natural state and timbered land;however J showed the exactly opposite trend.The values of R,H,D and J in herbaceous layer were the highest under litter removed,then followed by timbered and natural forests.The best regeneration of seedlings was found in the timbered land and on the shady slopes,respectively.