Self-tapping screw not prone to slipping

The utility model relates to the field of self-tapping screws, and discloses a non-slip self-tapping screw, which comprises a nut, a screw rod and a drill bit, the drill bit is in a hollow state, a fixing mechanism is arranged in the drill bit, the fixing mechanism is used for preventing the screw from rotating, and the fixing mechanism comprises a fixing rod and a special-shaped sliding block. The fixing rod penetrates through a through hole formed in the drill bit and is movably connected with the drill bit in a sleeving mode, and one end of the inner side of the fixing rod is fixedly connected with a triangular sliding block. The fixing rod is popped out by pulling force generated when the screw spirally enters an object, the effect of preventing the screw from rotating is achieved, meanwhile, the drill bit and the drill bit teeth are additionally arranged at the lower end of the screw, the phenomenon that the head of the screw slips on the surface of the object and cannot be drilled into the object is avo