Blood vessel closure device and blood vessel closure system

The invention relates to a blood vessel closure device and a blood vessel closure system.The blood vessel closure device comprises an absorbable inner piece, an absorbable outer piece and a connecting piece, the inner piece is arranged at the far end of the outer piece, and the connecting piece is connected with the inner piece and the outer piece; the inner piece comprises a middle area, a front side area, a left side area, a rear side area and a right side area, wherein the front side area, the left side area, the rear side area and the right side area are arranged around the middle area. The connecting piece is arranged in the middle area. Wherein the left side area and the right side area tilt towards the far end direction of the central axis of the connecting piece relative to the middle area, and the front side area tilts towards the near end direction of the central axis of the connecting piece relative to the middle area, so that an incident flow surface is formed on the surface, far away from the con