Auxiliary monitoring and measuring device for tunnel

The utility model provides an auxiliary monitoring and measuring device for a tunnel, which comprises a fixed rod, a threaded rod fixedly connected to one end of an embedded rod, a sleeve in threaded connection to the other end part of the threaded rod, and a hollow mounting box arranged at the other end part of the sleeve, the transparent protection cover is installed on the side wall of the side, close to the sleeve, of the installation box, the reflective sticker is located in the transparent protection cover and pasted to the side wall of the installation box, and the hook can extend outwards or retract inwards from an opening part of the side wall of the installation box through a connecting mechanism. According to the utility model, not only is the damage of flying rocks to a measuring point effectively reduced, but also the reflective sticker is effectively prevented from being polluted by dust, water stains and mud, the cleanness of the reflective sticker is ensured, the reflective effect of the refle