Abstract: Based on the traditional strength reduction technique，the creep strength reduction technique of considering creep property of rock and soil medium have been proposed.The FLAC2D geological model of the main slip line profile is established，and the creep aging stability of landslide is studied by using creep strength reduction technique with respect to a landside in Chongqing city.The results show that：①the displacement of monitoring point in landslide leading edge is the biggest，followed by that under sliding bottom when experienced the same creep time.It indicates that landslide damage begins with the leading edge and generally moves to the trail edge along with the sliding surface；②the landslide long-term stability coefficient is 1.18 with considering creep property of rock and soil medium，and it's 1.26 with not，lower by 6.3%.It indicated that creep is not conducive to the stability of landslide.It suggests the stability coefficient 1.18 as the parameter for engineering design and geological hazard assessment.

Key words: Landslide, Creep, Creep strength reduction technique, Long-term stability