Large-size AG glass etching fixing tool

The utility model discloses a large-size AG glass etching fixing tool which comprises a protective cover, a first ball screw is rotationally connected to the inner wall of one side of the protective cover, and a second ball screw is welded to one end of the first ball screw. The outer wall of one side of the first ball screw and the outer wall of one side of the second ball screw are connected with first screw nut seats in a screwed mode through threads, the tops of the first screw nut seats are fixedly connected with clamping plates through bolts, balls are embedded into the tops of the clamping plates, and the outer wall of one side of each clamping plate is connected with a rubber pad in an adhesive mode through glue; and the inner bottom of the protective cover is fixedly connected with a liquid collecting box through a bolt. According to the large-size AG glass etching fixing tool, glass is clamped and fixed in the protective cover through the two L-shaped clamping plates, under the rotation of the balls