The invention provides a full-automatic mold-free pipe bender which comprises an upper bracket and a lower bracket that are arranged vertically and over against each other, wherein upper conveying rollers are arranged at the bottom of the upper bracket; lower conveying rollers are arranged at the top of the lower bracket; a base is arranged at the bottom of the lower bracket; a force application device connected with the lower bracket is arranged on the base; a pipe inlet is formed on one side of a clearance between the upper bracket and the lower bracket; a pipe outlet is formed on the other side of the clearance between the upper bracket and the lower bracket; an annular guide ball pressing sleeve is arranged on one side of the pipe outlet, internally provided with a guide ball and adapted to the guide ball; a guide hole penetrating the guide ball and taking the center of the guide ball as a center is formed in the guide ball; and a guide ball pushing device is connected with the bottom of the guide ball pressing sleeve. The pipe bender is high in processing efficiency, automation degree and processing precision, reduces the use number of molds greatly, lowers the production cost, reduces the labor intensity of a worker, and can realize precise regulation of the processing curvature of a pipe fitting.