Curtain water wave ruler

The invention discloses a curtain water wave ruler. The curtain water wave ruler comprises a long locating plate and an upper line plate which are vertical to each other; the upper line plate is provided with scales, and is connected with a scribing ruler plate capable of rotating relative to the upper line plate; the scribing ruler plate is provided with a plurality of serrated protrusions provided with first fold distance scales; a connecting rod is connected between the scribing ruler plate and the long locating plate; one end of the connecting rod is fixed on the scribing ruler plate, and the other end of the connecting rod can slide on the long locating plate; the long locating plate is provided with a ruler end; a free end of the scribing ruler plate is provided with a first locating column; and a lower line plate is arranged between the first locating column and the ruler end. By adopting the structure, the curtain water wave ruler identifies positions to be cut through the serrated protrusions, and a