The excessive thinning and performance deterioration of bellows prepared by the traditional forming process limit the application of bellows in the aerospace field. Therefore, the bellows was fabricated by the dieless forming process that induced the axial buckling of tube blank by local heating and axial compression. Furthermore, in order to obtain the bellows with small radius-to-thickness ratio, uniform corrugation and good comprehensive performance by using dieless forming process, the influence laws of heating temperature, deformation zone width and compression ratio on forming load, corrugation shape of bellows, peak height，peak spacing and peak thickness were studied by combining experiment and finite element simulation. The research results show that with the increasing of heating temperature, the forming load of bellows decreases significantly. As the width of the deformation zone increaseing, the peak height and peak spacing tend to increase, while the peak thickness tends to decrease. With the increasing of compression ratio, the peak height tends to increase, and the peak spacing shows a decreasing trend.