Aiming at issues of natural vegetation cover area continuous reduction and eco-environment deterioration, the present situation of natural vegetative cover and its existing problem was detected clearly first adopting jointly methods of field investigation and current research results collection. Analysis results for vegetation cover degeneration reasons deduce that protection measures should include the following: to enlarge drylot feeding scale, control livestock number according to bearing capacity of grassland, increase water supply and enlarge irrigation area, develop reforestation, construct small scale artificial biosphere, and so on.