Angle measuring device for supporting anchor rod of coal mine tunnel

A coal mine tunnel support anchor rod angle measuring device disclosed by the present invention comprises a cross-shaped frame body, a semicircular calibrated scale and a gravity hammer, the cross-shaped frame body comprises a mounting connecting rod and a connecting connecting rod, one end of the mounting connecting rod is provided with a first nut, and the other end of the mounting connecting rod is provided with a second nut; at least two first hooks are arranged on the right-angle side of the semicircular graduated scale, the semicircular graduated scale can be detachably hung on the installation connecting rod or the connection connecting rod through the first hooks, a second hook is arranged in the center of the right-angle side of the semicircular graduated scale, and the gravity hammer is hung on the second hook through a soft rope. The device is simple in structure, convenient to operate, high in measurement precision, capable of measuring the inclination angle of the anchor rod in the vertical direc