Abstract: Based on choosing safety factor that has prodigious influence on effect and expense of prevention and cure in the landslide, whether safety repertory factor of landslide defined according to safety factor can weigh landslide safety repertory value behind being fathered or not is worth pondering over. Several criterions of different country and industry are listed in order to explain and discuss this problem. The conclusion indicates that safety degree analyse need consider safety repertory factor and stable factor behind being fathering,and put forward choosing value advice method of loads in the design of anti-sliding and supporting and holding up.