In the construction of airport engineering in mountain areas

high fill engineering has the characteristics of undulating terrain

complex geological conditions and huge volume of excavation due to the limit of topography.Thus

a series of special engineering problems appears during the construction of airports in mountain areas

especially the stability of high fillings is the hotspots and difficult points in the research field of airport construction.The stability of high fill slope in mountain airport involves many aspects

such as geological structure

lithology

volume of fillings

fillings height

properties of filled material

compaction method

construction quality and drainage.The deformation mechanism and control technology of high fill slope engineering in an airport was well studied in this paper in order to facilitate the analysis.（1）As for the deformation mechanism of the fill slope

the authors first analyze and summarize the existing data.Then the factors that influence the stability of the fill slope were studied combined with the engineering practice.The influences of the underlying slope structure

rainfall and groundwater

earthquake

fillings properties and construction technology are all considered in this research.Next four types of slope structure under filling body were proposed.Finally the deformation and failure behavior of each slope type was analyzed deeply.（2）As for the deformation control technology

on the basis of the control theory of "three-surface integrated"

the authors analyze the control effect of high fill slope considering earthwork balance

foundation treatment and reinforcement

drainage and retaining structures for the studied airport.This research has important significance for further understanding the slope deformation mechanism and improving the control technology on high fill slope in mountain airport.