Abstract: A medical conduit includes a first conduit, a second conduit and a third conduit. The first conduit is bigger than the third conduit in length and built within the third conduit; one end of the first conduit penetrates a bore at one end of the third conduit, while the other end of the first conduit penetrates a through-hole on the side wall of the other end of the third conduit and, together with the other end of the third conduit, forms a Y shape; the side wall at the other end of the first conduit is provided with a number of through-holes for guiding liquid or gas; one end of the second conduit is embedded at the bore at one end of the third conduit. The medical conduit can perform guidance and location in a human body and separately conduct injection and exhaustion to provide accurate measuring data for doctors.