The invention discloses a multi-functional pipe fitting, and belongs to the field of pipeline transporting equipment. The multi-functional pipe fitting comprises a pipe fitting body. Three connecting openings are formed in the pipe fitting body. Internal threads are arranged in the connecting openings. Grooves are formed in the outer walls of the connecting openings, and external threads are arranged in the grooves. Fastening nuts are arranged in the grooves, wherein the fastening nuts are matched with the external threads. At least three notches are formed in the connecting openings. The lengths of the groove mouths are less than 1/2 that of the connecting openings. The groove mouths are formed in the connecting openings of the pipe fitting, so that the contact area is reduced, assembly is simple and more convenient, the insertion length of pipes can be known clearly, the fastening nuts in notches can fasten the pipe fitting and the pipes twice, and using is convenient.