The present invention relates a circular vibratory finishing machine (1) with automatic separation of the parts to be treated (3) and of the finishing media (4), comprising a circular tank body (2) for containing the parts to be treated (3) and the finishing media (4) and provided with a bottom (10) that has an extraction ramp (11) that can be engaged by an extraction flap (15) for conveying the mass being treated in the tank body (2) toward a grille (20) for separating the treated parts. The particularity of the invention consists in that it comprises, below the separation grille (20), an intermediate grille (30) is provided for selecting the finishing media (4) in order to convey the reusable finishing media (4) into the tank body (2) and the undersized finishing media (5) onto a lower surface (40) for outward evacuation.