Craniotomy drill main machine

The utility model discloses a craniotomy drill main machine. The craniotomy drill main machine comprises a handle (1) at the lower part and an accommodating part (2) at the upper part, the stator and the rotor (5) of a direct current motor are arranged in the accommodating part, the wall (4) of the accommodating part (2) serves as a casing of the stator of the direct current motor, a baffle (6) with a hole is arranged at the rear part of the accommodating part (2), and an end cover (3) is hermetically connected with the rear end of the accommodating part (2) through screw threads; and a conductor on the stator of the direct current motor passes through the hole on the baffle (6) and enters the interior part of the handle (1). The craniotomy drill main machine has a simple structure, and takes the wall of the accommodating part directly as the casing of the stator of the direct current motor, so that the volume is reduced, and the whole weight is lightened; the sliding phenomenon of the motor is avoided, therefore the safety performance is higher; and the adoption of the integrative design, the waterproof material and the waterproof technology enables the waterproof performance of the craniotomy drill main machine to be better.