Disposable vacuum blood collection tube for quantitative blood collection

The utility model relates to the technical field of medical instruments, and discloses a disposable vacuum blood collection tube for quantitative blood collection, which comprises a vacuum blood collection tube body, a blood collection component is arranged on the surface of the vacuum blood collection tube body, and the blood collection component comprises a sealing cap, a mounting groove, a concave block, a slot, a rubber plug, a control mechanism and a placement component. The sealing cap is connected to the top end of the vacuum blood collection tube body in a threaded mode, a mounting groove is formed in the top end of the sealing cap, a concave block is fixedly arranged in the mounting groove, an inserting groove is formed in the middle of the concave block, and in order to reduce the situation that a syringe needle pricks the blood collection tube and the vacuum blood collection tube body obliquely, the smooth concave block is arranged at the top of the sealing cap; the inserting groove is formed in th