Cavity structure of artificial blood vessel injection port

Disclosed is a cavity structure of an artificial blood vessel injection port. The cavity structure of the artificial blood vessel injection port comprises an injection port body and a connecting catheter. The injection port body comprises an injection unit and a base, wherein the injection unit is fixedly arranged above the base, an injection cavity is formed inside the injection port body, an injection surface is arranged on the outer circumference of the injection unit, and a lining seat is arranged on the inner circumference of the base, so that the base can avoid being punctured by a needle; the portion of the inner circumference of the base, which is adjacent to the bottom, is sequentially provided with an assembling hole and a notch; the portion of the inner circumference of the lining seat, which is adjacent to the assembling hole, is provided with a guide hole, which expands from outside to inside and is arranged in a streamline shape; the connecting catheter is fixed onto the injection port body. The