The invention discloses a cable fixator. The cable fixator comprises a cross arm bracket connecting device and a cable fixing device, and an intermediate connecting device is arranged between the cross arm bracket connecting device and the cable fixing device; the cross arm bracket connecting device comprises an upper connecting hood and a lower connecting hood which are oppositely arranged, the upper connecting hood and the lower connecting hood can encircle two arc-shaped plates of a cross arm bracket after being oppositely closed, one end of the upper connecting hood is hinged to one end of the lower connecting hood, and a connecting hood locking device is arranged between the other end of the upper connecting hood and the other end of the lower connecting hood; and the cable fixing device comprises an upper fixing hood and a lower fixing hood which are oppositely arranged, the opposite inner sides of the upper fixing hood and the opposite inner sides of the lower fixing hood are each provided with grooves used for clamping a cable, one end of the upper fixing hood is hinged to one end of the lower fixing hood, and a fixing hood locking device is arranged between the other end of the upper fixing hood and the other end of the lower fixing hood. The cable fixator can be installed on the cross arm bracket to be used for fixing a standby cable, the outer skin of the fixed cable is free of damage, and the angle of the cable can be adjusted.