Assembled secondary test wire of external right-angle joint

The invention discloses an assembled secondary test wire of an external right-angle joint. The assembled secondary test wire comprises: a cable, wherein the end part of the cable extends to form an exposed cable core; a cable core connector which is used for clamping the cable core and comprises a clamping piece and a fastening ring arranged on the outer side of the clamping piece in a matched mode; a plug connector which is connected with the cable core connector in a matched mode and comprises an outer shell, a plug connector arranged at one end of the outer shell and a cover body arranged at the other end of the outer shell in a matched mode; and an external connector connected between the outer shell and the cover body in a matched mode. The cable core connector is of a reusable structure, connection and release of the clamping piece to the cable core can be achieved through tightening and loosening of a fastening ring, then the cable core connector is connected into the plug connector in the matched mode