The invention discloses a wire straightening machine comprising a box and a bottom plate. The box is provided with a first containing space, a first sealing plate and a second sealing plate, wherein the first sealing plate and the second sealing plate seal the containing space. The first sealing plate and the second sealing plate are fixed to the two ends of the bottom plate. A supporting plate is fixed to the portion, close to the first sealing plate, of the bottom plate. A slide way is arranged on the portion, close to the second sealing plate, of the bottom plate. The wire straightening machine meets the requirements of relevant technical conditions of circuit operation power transmission line electric power fitting straightening machines, operation tools are light and portable, installing is firm, assembling and disassembling are convenient, safety performance is high, the labor intensity of operation workers is relieved, the work efficiency is improved, and the wire straightening machine is economical and environment-friendly.