The invention discloses a producing method of an aviation connecting piece with consistent metal flow. The producing method comprises the following steps of: cutting off according to actual requirements of products, then carrying out the first cold processing to enable the size of the connecting part of the aviation connecting piece to reach 38-42% of a design size; carrying out a second cold processing to enable the size to reach 83-87% of the design size; pre-heating to be at 760-790 degrees centigrade for atmosphere protection, and carrying out first thermal forming; continuously heating to be at 880-900 degrees centigrade for the atmosphere protection, and carrying out the second thermal forming; continuously heating to be at 1200-1250 degrees centigrade for the atmosphere protection, and carrying out third thermal forming; and naturally cooling to obtain the aviation connecting piece with the consistent metal flow. The producing method of the aviation connecting piece with the consistent metal flow, disclosed by the invention, is easy, and required devices are simple. The aviation connecting piece with the consistent metal flow is produced just by doing certain improvement on the craft on the base of the existing devices.