Non-metal oil pipe expanded joint, oil pipe and mounting method of joint

The invention provides a non-metal oil pipe expansion joint, an oil pipe and a mounting method of the joint, a non-metal pipe body of the oil pipe comprises a tubular reinforcing layer and a tubular lining layer located in the reinforcing layer, the lining layer and the reinforcing layer are tightly combined together, the joint comprises a joint body, the joint body is tubular, and one end of the joint body is provided with a connecting thread; the expansion connection sleeve is tubular, located in the connector body and coaxial with the connector body, and a part of the outer wall of the expansion connection sleeve can be pressed on the inner wall of the connector body in the state that the connector body and the expansion connection sleeve are installed. And the other part can directly press the part, between the outer wall of the expansion sleeve and the inner wall of the joint body, of the reinforcing layer on the inner wall of the joint body, so that the outer wall of the reinforcing layer and the inner