Stable connecting device for building structure

The utility model discloses a stable connecting device for a building structure, which comprises a supporting mechanism, a fixing mechanism is arranged at the top of the supporting mechanism, the supporting mechanism comprises a first supporting column, the inner wall of one end of the first supporting column is rotatably connected with a first stabilizing plate, and the inner wall of the other end of the first supporting column is rotatably connected with a second supporting column. A second stabilizing plate is rotatably connected to the inner wall of the other end of the second supporting column, a movable plate is slidably connected to the outer wall of the side, close to the second supporting column, of the first supporting column, a pull ring is fixedly installed on the side, away from the first supporting column, of the outer wall of the movable plate, and fixing shafts are symmetrically and fixedly installed on the other side of the movable plate; a first spring is fixedly connected to one side of the