The invention relates to the technical field of drill bits and in particular relates to a drill bit capable of removing inner chips. The drill bit comprises a drill bit body, wherein a liquid injection channel filled with conductive liquid is arranged in the center of the drill bit body; the upper part of the liquid injection channel is connected with a first lead; the first lead is sequentially connected with a power supply and an indicator lamp; a second lead is arranged in the drill bit body separated from the liquid injection channel; the second lead passes through the drill bit body; one end of the second lead is connected with a central blade; a lead hole is formed in the lower part of the liquid injection channel in the central blade which is arranged at the bottom of the drill bit body; the end of the second lead is departed from the central blade; the other end of the second lead is connected with the indicator lamp; a vent hole and a chip removal hole are symmetrically formed in the drill bit body on two sides of the liquid injection channel; the vent hole is connected with a fan; the upper end of the chip removal hole is connected with an air pump which consist of a motor and a fan blade wheel; a cooling oil cavity is formed in the drill bit body facing outwards from the centers of the vent hole and the chip removal hole. The drill bit capable of removing the inner chips provided by the technical scheme is used for cooling and detecting whether the drill bit is damaged.