Provided is a jack steel strand encoder, including an encoding bench. A plurality of groove holes for receiving steel strands are sequentially arranged in the encoding bench, a pressing plate is arranged on the groove holes, the two ends of the pressing plate are provided with hangers, and the encoding bench is in a square structure. The encoder provided can ensure the correct laying sequence and the threading operation of the steel strands, meanwhile, the encoder provided can ensure the normal use of the threaded steel strands; furthermore, the encoder improves the efficiency and accuracy of steel strand laying, and alleviates operation personnel's labor intensity.