Abstract: The gamma-energy spectrum detection was performed on the Daliushu dam site of Heisanxia of Huanghe River. The obtained result was systematicallly analyzed by mathematical statistical method on the basis engineering geological investigation and in connection with geological conditions of the dam site. From these data the some engineering geological problems, such as wether the fault F201 passes nearby the dam site and its extent, the surface gullies in Qingtuoya-Hongguliang zone and genesis and stability of ground fissures in surroundings of the site are preliminarily evaluated and disscussed in this paper.