Comprehensive controlling soil and water loss on the loss plateau has made great achievements since 1949

but there are some problems which should not be neglected: ( 1) The harnessing effect mainly focused on the important regionsand typical watershed

the overall degree of controlling is not good

the total controlling level is quite low

the speed of harnessing is not quick|( 2) The density of population on the loess plateau is far exceed the reasonable capacity there

the contradiction among population

farmland forestry and grain is marked

the controlling on loess plateau made the solving food problem ( dressing warmly and eating fully

etc. ) as its effect|( 3) The purely government conduct and freeinvestment pattern are not beneficial for improving the comprehensive controlling

beside that

the harness policy on loess plateau and enforcement principle have not been thought with the native social

economic and cultural background as a whole

in other word

we have not converted the controlling into the conscious action of native masses themselves

so the results are not good

eco-environment is getting from bad to worsen

so serious soil and water loss and poverty are still the main obstacles for developing society and economy there. In order to put an end to the backwardness of loess plateau

we must change our controlling thought reconstruct the new controlling pattern

the most important measurement is reconstructingeco-system.