Self-tapping screw

The utility model discloses a self-tapping screw which comprises a screw cap, a screw body and a drilling part, the screw cap is fixedly arranged at the top of the screw body, the drilling part is fixedly arranged at the bottom of the screw body, a first thread part is arranged on the screw body, and one or more through grooves are formed in the first thread part; according to the self-tapping screw disclosed by the invention, the through groove is formed in the first thread part, and in the process of tapping the self-tapping screw into a cement wall, the through groove is used for accommodating dust particles generated in the tapping process, so that the friction force between the first thread part and the inner wall of the cement wall is increased, and the connection tightness between the self-tapping screw and the inner wall of the cement wall is improved; the self-tapping screw can be fixed on a cement wall, so that the application range and the use flexibility of the self-tapping screw are improved. 本实用