Multi-connected infusion three-way valve

The utility model relates to the technical field of medical instruments and discloses a multi-union infusion three-way valve which comprises a three-way valve body, a change-over valve is arranged on the front face of the three-way valve body, sealing mechanisms are arranged on the left side, the right side and the lower portion of the three-way valve body respectively, a connecting mechanism is arranged above the three-way valve body, and each sealing mechanism comprises a threaded connecting pipe. The left side of the threaded connection pipe is fixedly connected to the middle of the left side of the three-way valve body, and a first sealing cap is arranged outside the left side of the threaded connection pipe. The left side of the three-way valve body is connected with the threaded connecting pipe, and the first sealing cap and the threaded connecting pipe can rotate in a threaded mode through the first internal threads formed in the inner wall of the first sealing cap, so that the threaded connecting pipe