The utility model relates to water bottom foundation bed leveling equipment, and discloses a riprap leveling device. The riprap leveling device comprises a riprap pipe, wherein a global positioning system (GPS) and a leveling head which are respectively arranged on the top and at the bottom of the riprap pipe; the leveling head is used for leveling a foundation bed; the GPS is used for determining the planar position and the bottom elevation of the riprap pipe; the riprap pipe comprises an upper part and a lower part; the upper part is a fixed main pipe; the lower part is a telescopic balance pipe; the balance pipe is connected with the leveling head; and the leveling head is provided with a sonar system for detecting a sea bottom groove bed and the elevation of the foundation bed. The riprap leveling device is simple in structure; the riprap pipe is used for riprapping the foundation bed; and when the elevation deviation of the foundation bed exceeds a certain range, the leveling head is used for leveling the foundation bed, so that the tamping and the leveling of the foundation bed are guaranteed, and the planeness of the foundation bed is high.