Anti-falling heavy weight drill rod

The utility model discloses an anti-falling heavy weight drill rod, and relates to the technical field of drill rods. The drilling rod comprises a plurality of drilling rod bodies which are connected end to end, a first channel is formed in one end of each drilling rod body, a connecting column is installed at the other end of each drilling rod body, and two limiting assemblies are installed in each first channel; and the limiting assembly comprises a first rotating plate, a sliding plate is arranged on one side of the first rotating plate, and a second rotating plate is movably matched with the upper side of the sliding plate. According to the spiral connecting structure of the drill rod, through the two second rotating plates, when the connecting column slides, the connecting column drives the two second rotating plates to rotate out of the two second channels respectively, so that the difficulty of dismantling the drill rod is lowered, damage to the spiral connecting structure of the drill rod is reduced,