Elevator guide rail guide ruler

The utility model belongs to the field of installation detection tools and particularly relates to an elevator guide rail guide ruler which can meet the requirement of no-scaffold operation and not interfere with the operation of an elevator during guide rail correction operation. The elevator guide rail guide ruler comprises a trapezoid plate-shaped guide ruler body and an installation base which is connected with the lower surface of the guide ruler body, a notch is arranged in the middle of the guide ruler body, standard scale lines are symmetrically arranged on two sides of the notch, and the standard scale lines are used for aligning to two line transects which are designed in a wellhole in advance and are located on two sides of a guide rail, so that the horizontal position of the guide rail is accurately located. A clamping groove is mounted in the notch, the clamping groove penetrates through the installation base, the guide ruler body, the notch and the clamping groove are coaxial, the notch and the clamping groove are used for matching with a T-shaped guide rail, and the guide ruler is clampingly mounted on a guide surface of the guide rail through the clamping groove. The guide ruler replaces tools of traditional guide rulers and the like and is combined with an elevator guide rail installation process so that high efficiency and high quality of guide rail installation and location are achieved.