Research purposes: The highway construction has been extended to mountainous area in the late 20th century. Due to complicated topography and geology condition, there have been many high slope and landslide problems during the construction after a lot of excavation slope deformation, not only increased the project investment, but also delayed the time limit, or even undermined the existing engineering facilities. Then, the high slope engineering has always been a major engineering geological problem in highway construction in mountainous area of our country. 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.%研究目的:20世纪末高速公路建设开始向山区延伸,由于复杂的地形地质条件,在建设中出现了众多高边坡和滑坡问题,施工开挖后发生了许多边坡变形,既增大了工程投资,又延误了工期,甚至破坏已有工程设施.因此,高边坡工程成为我国山区高速公路建设中的一个重大工程地质问题.研究结论:从我国岩土工程高边坡的复杂性及学科的发展角度出发,应倡导地质过程机制分析；强调地质与工程的结合、定性分析与定量评价的结合、系统思维与不确定思维的结合.对以下几方面的问题尚需进一步研究和探索:(1)地下排水效果的定量评价；(2)多排桩的推力分配,高悬臂桩和埋入式桩；(3)特殊地层大型滑坡的发生发展机理；(4)微型桩的结构形式和计算方法；(5)有限元计算和填方中锚索次应力监测、施工.
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