The invention discloses a rotary swaging forming equipment, which comprises a rotary swaging mechanism and a diameter changing mechanism, wherein the rotary swaging mechanism is fixed with a rotary swaging main base through left and right pin roller mounting disks; a rotary swaging spindle is connected with a diameter changing mechanism connecting frame and a turntable respectively; forging hammers are matched with a chute in the turntable; for the curved surfaces of the forging hammers, a four symmetrical cycloid rule and a multi-point contact design are adopted; auxiliary pin rollers matched with the curved surfaces of the forging hammers are arranged between main pin rollers uniformly distributed along the circumferential direction of the rotary swaging spindle; wedge-shaped blocks in the diameter changing mechanism are matched with a chute on the end part of a wedge-shaped block slide disk; left and right lug bosses on a diameter changing mechanism pushing disk are matched with a guide rail groove on the rotary swaging main base; the diameter changing mechanism is driven by a servomotor and a ballscrew nut fitting; by designing the sizes of a neck reducing area of a forging die, a transitional fillet and a hammering work area, a workpiece is reasonably hammered. The impact of the forging hammers on the equipment during rotary swaging is reduced, the vibration and noise of the equipment are reduced, high-precision real-time diameter changing hammering can be realized, and the equipment has the advantages of high forming precision and high efficiency.