The invention discloses a cranium drilling device for neurosurgical operation. The cranium drilling device comprises a supporting table, a
drill bit and an arc plate. A rack is mounted above the position, close a through hole, of the supporting table, the middle of the rack is movably connected with a rotary disc, and the lower portion of the rotary disc is connected with a connecting rod. The side, away from the supporting table, of the arc plate is movably connected with an
electromagnet, a guide groove is formed in the side, close to the supporting table, of the arc plate, a sliding block is movably connected in the guide groove, two sets of sliding rails are mounted on the side, away from the guide groove, of the sliding block, and scale marks are arranged on the side walls of the twosets of sliding rails at equal intervals. An electric push rod is mounted in the middle of the side, away from the guide groove, of the sliding block, a connecting block is mounted at the telescopic end of the electric push rod, a motor is mounted at the end, away from the electric push rod, of the connecting block, and the
drill bit is rotationally mounted at the output end of the motor through adrilling rod. According to the cranium drilling device, the relative position between the
drill bit and the cranium is adjusted easily and conveniently, the depth of the
drill bit into the cranium isadjusted well, and cranium drilling is convenient.