Abstract：Jiuzhai-Huanglong airfield is located in high mountain-narrow valley area of the eastern fringe of Tibet plateau，about 450 km far from the northwest of Chengdu. The airfield is on the accumulated terrace of Min river and goes through five large scoured gutters. The maximum height of the fill slopes reaches 102 m and the total cubic meter of earth and stone exceeds 4×107 m3. The structure of the ground made of quaternary river sediments，which contain sand layers，pebble layers，sandy clay，conglomerate rock and mudrock，is complicated and its mechanical behavior varies greatly. There are three active faults near the airfield with earthquake intensity Ⅷ. A numerical method combining three dimensional finite element method with pseudostatic analysis is employed in the dynamic stability analysis of the high fill slope. The results reveal that under earthquake with intensity Ⅷ，the possibility of integral slide of high fill slope is small，but the slope maybe fails disassembly. The fill slope stability is more sensitive to the earthquakes from Min river fault than that from Xueshan fault，which is controlled mainly by the boundary conditions of the fill body.
