Abstract: There are about 85 000 reservoirs in China now, and some dam crest are used as important traffic roads. Generally, the damcrest as an important traffic road is of bad influence on damproject. By comparing the safety factors of structural static stability against sliding and aseismatic stability of reservoir damslope in situation that with traffic loads and with no traffic loads, this paper put forward the conclusion that the damtop road has little effect on damsafety. Its result can be used for reference in damslope stabilitiy safety analysis.