The invention provides a pipe bender. The pipe bender comprises a main shaft and a mould fixedly connected with the side surface of the main shaft, as well as a driving structure fixedly connected with one end part of the main shaft, wherein the mould comprises a fixed mould and a plurality of movable moulds in position corresponding connection with the fixed mould; the fixed mould is provided with a continuous fixed mould contact curved surface; a continuous movable mould contact curved surface is arranged at the corresponding position of each of the movable moulds; and after the fixed mould is fixedly connected with the plurality of movable moulds, the fixed mould contact curved surface can be seamlessly fastened with the movable mould contact curved surfaces to form a loop laying pipe channel. According to the scheme provided by the invention, as the fixed mould and the movable moulds, which are provided with the continuous curved surfaces, are provided to form the loop laying pipe channel, bending production of loop laying pipes can be performed in the loop laying pipe channel; and as the curved surfaces are continuous, the curves of the loop laying pipes can be accurately controlled to ensure smooth curve transition and continuous and non-fluctuating curvature of the loop laying pipes, and accordingly, the loop laying pipes with high bending precision can be obtained.