Puncture needle with negative pressure sucker

The utility model discloses a puncture needle with a negative pressure sucker. The puncture needle is composed of a needle tube, a needle tube sleeve, a needle core and a needle handle. The needle tube is fixed on the needle tube sleeve, the needle core is fixedly connected with the needle handle, the needle core is inserted in the needle tube, a bypass port is formed in the side wall of the needle tube sleeve and connected with the negative pressure sucker, and the capacity of the negative pressure sucker is 2ml. After bone marrow puncture operation is successfully conducted, when bone marrow is extracted to be tested, the needle core is slowly pulled out to make the bypass port be communicated with the needle tube, at the moment, the bone marrow can automatically flow to the negative pressure sucker, after the negative pressure sucker is filled with the bone marrow, the needle core is pushed to the original position, and the bone marrow extraction operation is finished. Therefore, the operation is easy and