Concrete construction side formwork supporting device

The utility model discloses a concrete construction side formwork supporting device which comprises an installation block, a second rotating shaft is movably installed in one side of the installation block, the outer side of the second rotating shaft is fixedly connected with one end of a movable plate, and the other end of the movable plate is fixedly connected with one side of a flitch plate. The side, away from the movable plate, of the mounting block is fixedly connected with one side of a collecting box, a cavity is formed in the collecting box, and a door is movably mounted on the side, away from the mounting block, of the collecting box and movably connected with the collecting box through a hinge. The flitch plate can be tightly attached to one side of the side formwork through the obliquely-arranged movable plate, the mounting block is inserted into a foundation in cooperation with the upper blade foot, the collecting box is filled with some stones to increase the weight of the collecting box, collap