The utility model relates to a lightning -arrest supporter with adjustable be used for stone material parapet, including the base, be equipped with the sleeve of a vertical setting on the base, telescopic bottom links firmly with the base, is equipped with the internal thread on the sleeve inside wall, in the sleeve is stretched into to the lower part of a branch, the lower part of branch be equipped with with telescopic in the external screw thread that closes of thread?to?match, the upper portion of branch is the platykurtic, is equipped with the lightning -arrest fixing device that takes in one side of branch flat section position, the lightning -arrest fixing device that takes includes splint, and on branch was located through a bolt respectively in the upper portion of splint and lower part, one side that the middle part of splint is close to branch was equipped with interior arcs of recesses fixed part. The above technical scheme is adopted in the utility model, structural design is equitable, and the finished product stone material can not destroyed to fixed convenience not to be influenced wholly pleasing to the eye again, and construction convenience, it saves labour to save time, and lightning -arrest supporter height -adjustable makes that lightning -arrest area is laid, is fixed, the convenient flexibility of alignment.