The invention discloses a multi-guiderail synchronized imaginary axis servo gear used for a wide aperture antenna feeder system, belongs to the technical field of servo systems, and solves the problemin the prior art that the servo gear is not suitable for the wide aperture antenna feeder system. The multi-guiderail synchronized imaginary axis servo gear comprises a base, a motor and multiple imaginary axes,wherein the imaginary axes are installed on a base body of an unmanned aerial vehicle through the base; the imaginary axis is arc and comprises a drive imaginary axis used for driving theantenna feeder system to do pitching motions and at least one driven imaginary axis used for supporting the antenna feeder system, and the motor drives the drive imaginary axis to do pitching motions.The servo gear is used for connecting the antenna feeder system and the base body of the unmanned aerial vehicle.