The invention discloses a pipe joint. The pipe joint comprises a bolt with two corresponding ends; bilateral sides of the cylindrical pipe joint is provided with threads which are matched with the bolt; the front end of the threads are provided with a baffle ring; the distance between the threads and the baffle ring is smaller than a half of the thread distance; the grain shape of the threads is semicircular; internal threads of the bolt are in concave semicircular arc shapes. The pipe joint is mainly characterized by being provided with connecting flexible pipes symmetrically; the threads are in semicircular arc shapes; the flexile pipes sleeve the baffle ring of the pipe joint and then the bolt is fastened; the bolt does not squeeze and damage the flexible pipes due to functions of the baffle ring and water leakage is avoided.