According to the center leader 's instructio n of "soil erosion co ntrol and ecological agricultural co nstructio n”,this paper discuss some related scientific and technical problems.Considering the evolution of ecological enviro nment,it proves that the genetic and developmental processes of natural and human 's accelerated erosion and the basic principle of their control must be thoroughly understood.To the goal of system engineering construction of eco-environment,it discuss the related a nd coordinated problems of soil erosion control,erosion environment regulation,silt decreasing in the Yellow River and ecological agricultuated construction.Considering the important measures of eco-environment constructio n including the integral planing making,vegetation reconstruction,farmland construction,water resource construction and preventio n of new human 's accelerated erosionet,it points out that some researches on the scientific and technical key problem of the basic principle should be strengthened