Earthwork thickness detection ruler

The utility model relates to the technical field of water conservancy construction monitoring, in particular to an earthwork thickness detection ruler which comprises a column body, a limiting assembly, two pieces of limiting rubber, a connecting rope and a weight. The limiting assembly comprises a plurality of foot sleeves, a sliding ring plate, a plurality of stand columns and a plurality of conical heads. A mounting bin is arranged in the column body, a transparent plate is arranged on the column body, a handle is arranged on the upper end face of the column body, and a tool bit is arranged on the bottom face of the column body. The two pieces of limiting rubber are both in a circular truncated cone shape. Scale marks are arranged on the transparent plate; the sliding ring plate is in sliding connection with the peripheral surface of the column body; the multiple stand columns are installed on the bottom face of the sliding ring plate. The plurality of conical heads are respectively connected with the bott