Abstract：It is very important to confirm the depth and area for high-level radioactive waste(HLW) repository，especially in the HLW concept model and engineering design. The general requirements for determining the depth of the HLW disposal repository are discussed. The geological characteristic，hydrogeological characteristic，rock mechanics characteristic and geostresses characteristic are analyzed in Jiujing block，Beishan area，Gansu Province. Simultaneously，the initial geostresses and the geostresses after excavation are analyzed，and the probability of tunnel stability and rockburst are also calculated and predicted. The conclusion shows that the rock mass is intact；the underground water is short of supply and has a reduce environment 400 m below ground surface；the rock has a high uniaxial strength and the rock mass has good quality. The geostress is a general geostress field range from zero to 700 m below ground surface；and the tunnel stability and rockburst analysis display that the rockburst can not happen in the area from 400 m to 700 m below ground surface. According to the general requirements for the depth of repository，the designed depth of HLW disposal repository should be located in 400–700 m below ground surface.
