Connector and protective tube module thereof, and sheath

The present invention relates to a connector and a protective tube module thereof, and a sheath. The sheath takes the direction of inserting the sheath into a connector as the front, and comprises aninsulation body, the insulation body is provided with a holding cavity configured to hold a protective tube, an operation handle configured to pull out the insulation body from the connector is movably assembled on the insulation body, the operation handle comprises a hiding position configured to hide the operation handle onto the insulation body and an extruding position extruded out of the insulation body to be pulled out by people in the reciprocating motion process, the operation handle comprises an operation portion configured to push the operation handle to move towards the hiding position, a stop locking structure configured to limit the operation handle at the hiding position is arranged between the insulation body and the operation handle, an elastic piece configured to apply anaction force to the operat