Double-line screw with teeth on threads

The utility model relates to a screw, and particularly discloses a double-line screw with teeth on threads. The double-line screw comprises a main body, one end of the main body is a head part, and the other end of the main body is a drill tip part; the main body is provided with double threads, and the threads are spirally arranged in the axial direction from the drill tip part; the main body comprises a drilling subsection corresponding to the drill tip part, the length of the drilling subsection is 1/5-1/3 of the length of the main body, V-shaped notches are distributed on threads corresponding to the drilling subsection, and sawteeth are formed between every two adjacent V-shaped notches. According to the double-line screw, due to the fact that the sawteeth are arranged on the screw teeth, in the drilling process, compared with a conventional screw tooth form, the sawtoothed screw teeth can conduct drilling in an impact mode, the drilling difficulty is relatively small, and use convenience is better. 本实用新