Compound metal expansion joint for corrugated pipe connection

The utility model discloses a compound metal expansion joint for corrugated pipe connection, which comprises a middle pipe body and an end pipe body, the surface of the end pipe body is fixedly connected with a corrugated pipe, the surface of the middle pipe body is provided with a connecting mechanism, and the surface of the end pipe body is provided with a sealing mechanism. According to the compound metal expansion joint for corrugated pipe connection, two pipelines needing to be connected are inserted into the end pipe bodies on the two sides, the fixing block is pressed, the opposite faces of the two pipelines needing to be connected make contact, the auxiliary connecting plate is inserted into the main connecting plate till the fixing block reaches the position under the fixing groove, and the fixing block slides upwards along the fixing groove; the two ends of the double-end stud are connected with the main lug plate and the end lug plate, so that the pipe body and the end pipe body are tightly connect