Abstract: Based on a lot of field test data, the settl ement of embankment on soft ground with different improvement methods are di scusse d in this paper. With the soft ground improved respectively by DJM (Dry Jet Mixi ng) and preloading method, the settlements of embankment are analyzed. The resul ts sho w that the crust with high strength and the thickness of the soft cl ay are the key factors to inference the settlement, and there is a critical embankment heig ht (about 2.5 m) on the soft ground.