Based on the applications of GIS and RS and the indices such as diversity

dominance

evenness

frag-mentation

isolation

etc.

the landscape mosaic structure of Wufendigou experimental area in Huangfuchuan basin was studied. In terms of fractal dimension

the complexity of all landscape types was analyzed by constructing the fractal structure model of all landscape types and through using fractal theory and concerned quantitative methods.T he steppe landscape is dominant but not apparent in its patch and area

and the percentage of the original vegetation of Stipa bungeana steppe is very low in the study area

which is apparently characterized by human disturbance. The diversity and evenness of patches in the study area are higher than those of the steppe landscape area

and the fragmentation and the isolation of the steppe are the highest. The landscape shapes of artificial arbor woods and cultivated lands are the simplest

and the landscape shapes of classical steppe and artificial shrub are in an instable stage. From above results

we can conclude that it will spend a long time to restore original vegetation in the study area because of the strong disturbance and the unreasonable landscape structure.