This paper presents results of studies on the characteristics of population of brandt's vole (Microtus brandti) after rodent control. The investigation was carried out in the typical steppe in Zhengxiangbai County, Inner Mongolia, from April to September 1987 and 1988. Btandt's vole distributed in the steppe in Inner Mongolia is an important component of the rodent community in the typical steppe region.In field rodent control,0.05% wheat bait of Warfarin was used with the efficiency that is 83.03% and 75.4...