Blood vessel sheath tube fixing piece, catheter sterile cover and vascular sheathing canal assembly

The invention relates to the field of medical instruments, and discloses a blood vessel sheath tube fixing piece, a catheter sterile cover and a blood vessel sheath tube assembly. A blood vessel sheath, a catheter, a blood vessel sheath tube fixing piece and a catheter sterile cover are included, the catheter is arranged in the blood vessel sheath in a penetrating mode and is in sliding connectionwith the blood vessel sheath, the blood vessel sheath tube fixing piece is used for fixing a blood vessel sheath tube (the blood vessel sheath tube is short for a blood vessel sheath in which a thrombolysis catheter is arranged) to a patient, and the catheter sterile cover sleeves the tail of the blood vessel sheath tube and an in-vitro thrombolysis catheter. According to the blood vessel sheathtube fixing piece, medical staff can conveniently observe the bleeding state of a puncture point, and the situation that a dressing or the blood vessel sheath tube falls off or shifts to cause massivebleeding or infection of a