Multifunctional measuring supporting ruler for constructional engineering

The utility model discloses a multifunctional measuring supporting ruler for constructional engineering. The ruler comprises a straight ruler and a multipurpose ruler group, the multi-purpose ruler set comprises a multi-purpose ruler and a storage box. Corrugated teeth are formed in the top of the straight ruler; a rectangular sliding groove is formed in the outer wall of the front face of the ruler. A first scale line is arranged on the outer wall of the straight ruler at the top of the rectangular chute; a fixing nail is arranged at one end of the rectangular sliding groove. The other end, away from the fixing nail, of the rectangular sliding groove is slidably connected with a sliding block. A second scale line is arranged below the front surface of the straight ruler; a protractor is arranged on the outer wall of the front face of the multipurpose ruler set, scale marks are arranged on the outer wall of the bottom of the multipurpose ruler set, the length of the scale marks is matched with the diameter of