Twist strain clamp in advance

The utility model discloses a twist strain clamp in advance, including " U " font preformed armor rods and connecting block, preformed armor rods is including connecting wire and centre gripping line,the connecting wire is " U " font and links to each other with the connecting block, the centre gripping line twines on the optical cable, the centre gripping line is including last double -layered line and lower double -layered line, it divide into and is spirally wound goes up transposition section and the last linkage segment continuous with the connecting wire on the optical cable go up to press from both sides the line, double -layered line divide into and is lower transposition section and with the connecting wire continuous lower linkage segment of spirally wound on the optical cable down, on strand the segment length and strand the segment length under being less than, with the optical cable centre gripping in the last centre that presss from both sides line and down double -layered line, the length that