Blood collection test tube

The utility model relates to the technical field of test tubes, in particular to a blood collection test tube. The blood collection test tube comprises a collection test tube body, a connecting ring is fixedly connected to the surface of the collection test tube body, four grooves are formed in the surface of the connecting ring, a cover is arranged at the top of the collection test tube body, two sliding grooves are formed in the outer side of the collection test tube body, the structures in the two sliding grooves are the same, and clamping mechanisms are arranged in the sliding grooves. The clamping mechanism comprises a sliding rod, the sliding rod is fixedly connected in a sliding groove, the cover is moved after being aligned with the collection test tube, finally, a clamping block and a clamping groove can be blocked mutually, then fixing of the cover to the top of the collection test tube is completed, the mounting efficiency of the cover and the collection test tube is effectively improved, and the s