Novel three-way spin valve

The novel three-way spin valve comprises a three-way pipe body and an anti-pollution mechanism, the surface of the three-way pipe body is connected with a switch valve in a sealed mode, a liquid adjusting mechanism is arranged on the surface of a second connecting pipe, one side of the surface of the second connecting pipe is connected with a second protective cap, and the anti-pollution mechanism is arranged on one side of the surface of the second protective cap. One end of the third connecting pipe is provided with a filtering mechanism, one side of the surface of the filtering mechanism is connected with an infusion tube, through the arrangement of the anti-pollution mechanism, when a medical worker unscrews a protective cap, and then infusion is conducted on a patient, the protective cap is pulled by a pull rope, the situation that the medical worker places the protective cap to a polluted place is avoided, and the medical worker can conveniently use the protective cap. By arranging the liquid adjusting