Screen glass film pasting positioning and clamping mechanism, device and method

The invention relates to the technical field of electronic screen glass protective film pasting, in particular to a screen glass film pasting positioning and clamping mechanism, device and method. The mechanism comprises a clamping rack, a clamping cylinder, a clamping roller, a clamping bottom plate, positioning blocks and a plurality of clamping heads; the clamping heads comprise clamping bases, clamping connecting rods, clamping guide columns, clamping springs and clamping blocks, the clamping guide columns are in sliding fit with corresponding hole sites of the clamping bases, the front end of the clamping guide columns are connected with the rear side face of the lower end of the clamping blocks, and the two ends of the clamping springs make contact with the rear side face of the clamping bases and a protrusion at the tail end of the clamping guide columns respectively; the positioning blocks are fixed on the clamping bottom plates, the inner side surfaces of the positioning blocks are respectively conta