Aluminum alloy formwork external corner fixing device

The utility model relates to the field of external corner fixing, and discloses an aluminum alloy formwork external corner fixing device which comprises a second fixing plate and a threaded rod, a conversion mechanism is arranged at one end of the second fixing plate, the conversion mechanism is used for converting different shapes to adapt to external corners of different angles, and the conversion mechanism comprises a plurality of screw sleeves. Sleeve shaft rods fixedly connected with the upper end and the lower end of the screw sleeve are movably connected with the supporting plate. A screwing mechanism is arranged on a rod body of the threaded rod, the screwing mechanism is used for tightening the first fixing plate and the second fixing plate, and the screwing mechanism comprises a nut. According to the external corner fixing device, the specification-convertible design is adopted, and the number of external corner fixing devices with different specifications is reduced, so that the cost for fixing the