The settlement control of high-speed railway is a key technology of the embankment engineering.In allusion to the engineering characteristic of deep completely decomposed granite ground in east surround passenger railway of Hainan,based on a set of centrifuge model tests,studied the embankment settlements of ground untreated,dynamic compaction and reinforced by cement-mixed pile,reached the relationship between settlement and time,including settlement during and post-construction.It was indicated that:Weibull model can describe the relationship between embankment settlement and time.The settlements are to meet the requirements of code.