The invention discloses a hammer forging forming method of a high-temperature alloy GH4169 abnormal shape forge piece. The hammer forging forming method aims at carrying out the process analysis improvement on an existing forging device so as to solve the existing technical problems. According to the technical scheme, the hammer forging forming method includes the steps of after diffusion annealing is carried out on a phi 508mm steel ingot, adopting a high-speed forging machine and a precision forging machine to jointly carry out cogging, feeding a sizing material section after the cogging, placing the heated material section on a lower flat anvil (5), forging the material section into a step-shaped bar (2) in a certain standard, carrying out turning and hammer heating on the forged step-shaped bar (2), placing the step-shaped bar (2) into a mold (3), carrying out secondary mold forging, and turning the forged forge piece into the required size. The hammer forging forming method of the high-temperature alloy GH4169 abnormal shape forge piece has the advantages that the production of the abnormal shape forge piece is achieved by the forging flexibility, the process combining the primary hammer forging with the secondary mold forging is used, the problem that various parts of the forge piece are formed is solved, and meanwhile the combination of the two-time-forging process facilitates the accurate control over internal parts.