Protective device of road core drilling machine

The utility model relates to a protective device of a road coring machine, which belongs to the field of engineering detection in the building industry, and comprises a bottom plate, a support is fixed on the bottom plate, the bottom plate and the support form a frame structure, a mounting plate is arranged in the support, a coring cylinder is mounted below the mounting plate, and the coring cylinder is fixed on the bottom plate. The coring cylinder is arranged between the mounting plate and the bottom plate, an opening allowing the coring cylinder to penetrate through is formed in the bottom plate below the coring cylinder, a core drilling machine motor is fixed above the mounting plate and connected with the coring cylinder, and a first push-pull rod and a second push-pull rod are arranged on the supports on the two sides of the coring cylinder respectively. A first baffle plate and a second baffle plate are respectively arranged at the end parts of the first push-pull rod and the second push-pull rod, so t