The invention provides a rotary
cut guide wire and a
calcification lesion tearing device. The rotary
cut guide wire comprises a guide wire body, a plurality of
cutting pieces and at least one attaching piece, wherein the
cutting pieces and the attaching piece are arranged on the guide wire body. The multiple
cutting pieces are arranged in the circumferential direction of the guide wire body, one side of each cutting piece is rotationally connected with the guide wire body, the other side of each cutting piece is provided with a cutting edge, and the cutting edges are away from the guide wire body when the cutting pieces rotate relative to the guide wire body. The attaching piece enables multiple cutting pieces to be gathered on the surface of the guide wire body, the cutting pieces are not prone to
scratching blood vessels when entering the blood vessels along with the guide wire body, and safety is high. A medical worker conveys the cutting pieces to the
calcification lesion position through the guide wire body, then the guide wire body is further rotated, the side, connected to the guide wire body, of the cutting pieces is driven to rotate, and the cutting edges of the cutting pieces are blocked by the
calcification lesion and do not rotate along with the guide wire body. The cutting pieces overcome the acting force of the attaching piece and rotates relative to the guide wire body, the cutting pieces are gradually unfolded from the folded state, and the cutting edges are gradually away from the guide wire body and
cut into the calcification lesion.