Sheet metal side pressing device

The utility model discloses a sheet metal side pressing device. The sheet metal side pressing device comprises a base, a lower side pressing die and an upper side pressing die, wherein the lower side pressing die is installed on the base, the upper side pressing die is located above the lower side pressing die, the side faces of the lower side pressing die and the side faces of the upper side pressing die are in the shape of L, the lower side pressing die comprises a horizontal lower die base plate and a lower die press plate integrally connected to one side of the upper portion of the lower die base plate, the upper side pressing die comprises an upper die press plate matched with the upper portion of the lower die press plate, and an upper die connecting plate integrally connected to one side of the position below the upper die press plate, a plurality of air cylinders are installed on the base, piston rods of the air cylinders are fixedly connected with the lower end of the upper die connecting plate of th