The invention relates to a dismantling device for a solar warning board. The dismantling device comprises a hanging rack and a bracket arranged below the hanging rack; the hanging rack is connected tothe bracket through a bracket guide plate, the upper end of the bracket guide plate is connected to the hanging rack through a hinge, a guide slot is formed in the bracket guide plate, a guide bar isarranged on the bracket, the guide bar penetrates through the guide slot, and the upper end of the guide bar is in threaded connection to a limiting unit; two pothooks are arranged in a spaced mannerleft and right at the upper end of the hanging rack, and a pulling hook for opening a safety pothook is arranged in the middle of the upper end of the hanging rack; two layer boards are arranged in aspaced manner left and right on the bracket; a bracket limiting lock catch for limiting the layer boards is arranged on the bracket guide plate, the control end of the bracket limiting lock catch isconnected to an insulating pull rope, and the bracket guide plate is connected to an insulating operating rod; and the left and right ends of the hanging rack and the bracket are connected through twosprings arranged in a spaced manner left and right.