Stone curtain wall connecting fastener

The utility model relates to a stone curtain wall connecting fastener which comprises a stone plate used as a curtain wall, two bolts distributed up and down are arranged on the back face of the stone plate, the bolt on the upper portion is connected with an upper hanging piece, the bolt on the lower portion is connected with a lower hanging piece, an L-shaped plate is connected with a main keel, and a fastener without supporting legs is fixed to the L-shaped plate. The non-supporting-leg fastener is sleeved on the thick aluminum round pipe serving as a secondary keel, the supporting-leg fastener is sleeved on the thick aluminum round pipe, the upper hanging seat and the lower hanging seat are respectively connected with an upper supporting leg and a lower supporting leg of the supporting-leg fastener, the upper hanging piece is fixed on the lower hanging seat through an adjusting screw, and the lower hanging piece is fixed with the upper hanging seat through a clamping structure. And stone installation is co