Research conclusions:From the point view of complexity and science development of our geotechnical high slope，the mechanism should promote analysis of geological processes; emphasize the combination of geology and engineering，the combination of qualitative analysis and quantitative evaluation，the combination of the the system and uncertainty thinking．On the following issues need further research and exploration: (1) quantitative evaluation of the effect of underground drainage; (2) distribution of more than piles of thrust，high cantilever piles and submerged pile; (3) the occurrence and development mechanism of special formation of large landslides; (4) micro － pile structure and method of calculation; (5) prescription anchor secondary stress of the finite element and fill monitoring and construction．