The utility model discloses a system for it subsides to detect road embankment, the system includes the support, set up the laser instrument of the one end of support, set up the camera of the other end of support, with camera connect's controller and car, the one end of support is connected with one side of car, and the other end is unsettled, the laser instrument is the setting value with the contained angle of car, the camera is used for acquireing road surface image information, the controller is arranged in acquireing the image distance of road surface image information car to the curb toaccording to the standard distance and the setting value of storage in image distance, the controller, calculate the actual height that the camera arrived the road surface, still be used for the standard height according to storage in actual height and the controller, calculate road embankment's sedimentation value, road alignment information and sedimentation value that reunion garage crossed generate the road and subside change curve, have realized the detection of full automated inspection road embankment's sedimentation value. Consequently, adopt the system provided by the utility model,can the automated inspection road embankment sedimentation value.