Iron nail straightening device

The invention relates to the technical field of connecting piece straightening tools, and discloses an iron nail straightening device which comprises a first shell and a second shell, the first shell and the second shell are rotationally connected, arc-shaped shells are slidably connected to the tops of the inner walls of the first shell and the second shell correspondingly, and two sets of adjusting rods are slidably connected to the middles of the two arc-shaped shells correspondingly; and one end of each adjusting rod is fixedly connected with a guide plate, the other end of each adjusting rod is fixedly connected with an anti-falling plate, a first spring is arranged between the anti-falling plate and the arc-shaped shell, and the adjusting rods are sleeved with the middles of the first springs. Through the design of the adjustable part and the cooperation of the two limiting assemblies, when the iron nail is driven into objects such as a timber pile, the iron nail can be prevented from being bent, so tha