Abstract: A cable assembly for a cable tying device includes a cable having two or more rows of cavities arranged in a stagger way, and includes a tie head having two or more pairs of ratchet catches extended inward of a bore of the tie head. The pairs of ratchet catches each has one or more teeth arranged in a stagger way for engaging with the rows of cavities of the cable and for securing the cable to the tie head. The cable will not be easily disengaged or released from the tie head when only one or two of the ratchet catches are damaged or are disengaged from the tie head.