Disclosed are a force self-balance device used in multi-beam anchor rod or an anchor cable stretch-pull rod body and a construction method of the force self-balance device. The device comprises a counter-force anchor tool, a hollow lifting jack, a fixing base seat, a revolving piece and an annular cushion piece. The hollow lifting jack is connected with the fixing base seat in a socketing mode. A first elastic magnetism suction device is filled on the socketing position. One end of the revolving piece is movably connected with the fixing base seat. The other end of the revolving piece is connected with the counter-force anchor tool in a socketing mode. A second elastic magnetism suction device is filled on the socketing position. The annular cushion piece is cushioned on the connecting position of the revolving piece and the fixing base seat. Penetrating rib holes coincides with an axis line extension line corresponding to an axis line of an anchor hole of the counter-force anchor tool are all formed in the revolving piece and the fixing base seat. The penetrating rib holes penetrate through a revolving piece body and a fixing base seat body. The technical problems that the anchor rod or the anchor cable is snapped due to the fact that tension of each anchor rod or each anchor cable is different in the stretch-pull process of the existing multi-anchor beam or the anchor cable, thus uniform stress of all the anchor rods or the anchor cables can not be achieved are solved.