The utility model provides a glass locating device who is suitable for in glass film machine, base plate positioner fixed a position not accurate technical problem during had solved current sticking film machine, and the technical scheme of adoption is: include in positioner's the structure: with the help of coupling assembling set up bottom plate on rack chassis, with the help of the support frame setting the bottom plate top and have the sucking disc the locating platform, set up and accept the subassembly and set up the over -and -under type straight line actuating mechanism who accepts the subassembly lower extreme at the base plate at the base plate of locating platform below, the base plate is accepted the subassembly and is passed preformed hole on the locating platform mesa, is formed the over -and -under type base plate with the help of over -and -under type straight line actuating mechanism and hold access digit mechanism. The beneficial effects of the utility model are that: automatic last piece can be realized, because the position is accurate, the consumption of membrane can be saved.