The I-steel arc bending machine includes a working platform, a driving wheel and a pushing wheel are arranged on the working platform, and an adjustment rail arranged in parallel is also provided; the driving wheel is connected with a driving device, and the pushing wheel is connected with the driving device. Pusher connection. The pushing wheel is disposed between the two driving wheels, and the three are isosceles triangles. Compared with the method and device for the traditional hot-press I-steel-steel frame arc, the utility model has the advantages of simple structure and convenient operation. The I-beam is rolled into an arc-shaped steel frame at normal temperature, and the production and use are reduced. The temperature difference has solved the problem of large size deviation after the cold bending of I-beam and the installation does not meet the requirements.