The invention discloses a steel strand threading device, which comprises a threading machine. An arranging machine is arranged on the upper stream of the threading machine; a cutting machine is arranged on the lower stream of the threading machine; the arranging machine comprises an arranging plate and a moving support seat for driving the arranging plate to move along length directions of steel strands; and a plurality of arranging holes for the steel strands to penetrate through are formed in the arranging plate. The steel strand threading device provided by the invention realizes the integration of arranging, threading and cutting of the steel strands, and has the advantages of simple structure, high automation degree, high efficiency, cost saving, capability of preventing the steel strands from winding, capability of keeping the end parts of the steel strands parallel and level after threading, and the like.