Research conclusions: The depositional structure of soft clay is mainly characteristic of flocculent structure with high void ratio, lower shear strength and higher sensitivity. Dynamic vibration's effect on soft ground is similar to dynamic compaction's effect. The added number of void ratio by dynamic compaction on soft ground is 7 times as much as that by static load. The reason of failure of highway embankment is that the low embankment is placed by a dynamic vibrating roller with 16 t weight, roller compaction for 10 times. It is suggested that the parameters of shear strength of soft clay should be reduced or doing design computation of construction stability of highway embankment on structural soft ground road in the condition of vibration vibrating.