Rock core drill bit structure

The utility model provides a rock core drill bit structure which comprises a main drill rod, a rock core pipe connector, a rock core drill pipe and drill teeth. The rock core pipe connector is connected with the main drill rod through a tapered screw thread, the rock core drill pipe is connected with the rock core pipe connector through a screw thread, the drill teeth are arranged at the bottom end of the rock core drill pipe, a reverse opening inclined pipe with the outer diameter the same as that of the rock core drill pipe is arranged above the rock core pipe connector, the upper end face of the reverse opening inclined pipe is opened, the lower side of the reverse opening inclined pipe is connected with the rock core pipe connector through a screw thread to form a cylinder with the sealed bottom, the upper end of the wall of the reverse opening inclined pipe is in an inclined state, and the included angle formed between the inclined face and the horizontal plane ranges from 35 degrees to 45 degrees. The r