The research of vegetation restoration of freeway slopes lagging in the construction of freeway seriously in our country, it has restricted the progress of construction of the environmental landscaped roadway of the freeway greatly. The paper reviewed the main researched contents of the slope vegetation restoration of freeway in domestic and international, and summarize as five respects: technological research, plant choose and proportioning research, maintenance and management searches, vegetation community research and ecologic environment of freeway. By comparing, it has defined the current situation of research in vegetation restoration of freeway in our country, and has pointed out the weak point in each research field and main reasons of defeated restoration, which had offered the clear direction of study on the future research in the slope vegetation restoration.