The invention discloses a method for forming a high-temperature alloy flange for an aeroengine. The method comprises the following steps: firstly, heating a high-temperature alloy blanked according to specifications until a deformation temperature, carrying out upsetting and punching, and then carrying out rolling to form a ring blank; secondly, dividing and marking the ring blank to divide the ring blank into arc sections corresponding to various edges of the flange, next, performing local bulging on each arc section to obtain a corresponding deflection, and further carrying out pre-budging and finish bulging to obtain the desired flange. The flange prepared by use of the method is relatively high in structure properties, dimensional accuracy and material utilization rate, and good in quality consistency and reliability. The method is mainly used for producing the high-temperature alloy flanges for the aeroengines .