Plug structure for pressure resistance test of plastic tubes and pipes

The utility model discloses a plug structure for pressure resistance test of plastic tubes and pipes, which comprises plastic tubes and pipes, a supporting part and a plug seat. One end of the plug seat is a sealing end, the other end of the plug seat is an open end, and a fastening portion is arranged outside the plug seat. The supporting part is formed by fixing and fastening the two parts and fixedly connected with the plastic tubes and pipes and the plug seat. Buttress threads are arranged at one end of the supporting part corresponding to the plastic tubes and pipes, and a groove is arranged at the other end of the supporting part corresponding to the open end of the plug seat and matched with the fastening portion arranged outside the plug seat. The plastic tubes and pipes penetrate through the buttress threads of the supporting part and extend to the sealing end of the plug seat. Compared with the prior art, the supporting part is fixedly matched with the plug seat. The plug structure is simple in stru