Sterile rotation stopping knife for screwing cap of PET (Polyethylene Terephthalate) bottle

The invention discloses a sterile rotation stopping knife for screwing caps of PET bottles, which comprises special-shaped semi-rings, appearance lugs, alignment steps and stainless steel knife noses, the special-shaped semi-rings can be used independently or in pairs, the sterile rotation stopping knife is characterized in that three groups of appearance lugs are sequentially arranged on the outer edges of the special-shaped semi-rings, the alignment steps are fixed above the appearance lugs, and the stainless steel knife noses are arranged on the outer edges of the stainless steel knife noses. Three sets of stainless steel tool noses are distributed in the axial direction of the special-shaped semi-ring according to the same radius and equal angle. According to the invention, filling materials and possible foreign matters cannot be retained around the bottle opening of the PET bottle through smaller installation matching and the flow guide gap, the environment around the bottle opening can be efficiently cl