The corrugated cable co-axial connector includes a connection body (1), having an internal thread (12) in a connector through hole (11); a clamping nut (2), having a central through hole (21), having a cable end and a clamping end in an axial direction of the central through hole (21) which are opposite to each other, and having an external thread (22) at the clamping end; an annular elastic clip (3) which is axially slidingly fitted into the central through hole (21) of the clamping nut (2); and a resilient ring (4) sleeved around the annular elastic clip (3) and located between the clamping end of the clamping nut (2) and the annular elastic clip (3). When a corrugated cable (10) having a corrugated outer conductor (102) is received in the central through hole (21) of the clamping nut (2), the connector body (1) applies at least a radial inward force to the annular elastic clip (3) by the engagement of the external thread (22) and the internal thread (12), to lock the corrugated cable (10) in the annular elastic clip (3). The connector is simple to manufacture and is convenient to use. At the same time, it is able to ensure the reliable cable connection and is suitable for repeated use.