The invention discloses a small-amplitude motion hollow-out anode electroforming system and method for manufacturing a complex thin wall profile and belongs to the field of electroforming machining. A hollow-out insoluble conformal anode (3) and a small-amplitude motion mechanism (1) are adopted in the technology. In the electroforming process, the hollow-out insoluble conformal anode is adopted as the anode, and a small clearance is kept between a cathode and the anode. The small-amplitude motion mechanism (1) drives the anode (3) to do small-amplitude motion with the proper amplitude and frequency, the influences of a hollow-out part on an electric field on the surface of the cathode can be avoided, in addition, a solution can be effectively stirred, hydrogen bubbles adsorbed to the surface of the cathode are removed, and the mass transfer velocity of electrodeposition is increased. By means of the small-amplitude motion hollow-out anode electroforming system and method for manufacturing the complex thin wall profile, it can be ensured that the relatively uniform electric field and a relatively uniform flow field are obtained on the surface of the cathode, and therefore the uniformity of an electroformed layer of the complex thin wall profile is improved.