The utility model relates to a prestressing force tensile testing machine anchor clamps for carry out tensile test to the prestress wire, these anchor clamps include: the anchor clamps main part, including the V -arrangement groove that is used for placing steel strand wires, V -arrangement groove longitudinal arrangement is on the upper surface of anchor clamps main part, and the basal portion, be located the lower surface of anchor clamps main part, along the transversal arrangement of anchor clamps main part to an all be provided with double -layered tooth on two surfaces, be used for the centre gripping steel hinge line for inciting somebody to action anchor clamps are fixed on the testing machine, wherein, and in the V -arrangement groove of constituteing the anchor clamps main partthe utility model discloses a prestressing force tensile testing machine anchor clamps can solve the steel hinge line just unsatisfactory problem of breakpoint location of skidding when the operation effectively.