Abstract: A circular needling machine for needling a textile structure formed from a helical fiber sheet, includes a needling table disposed beneath a feed table for feeding a helical fiber sheet for needling. The feed table includes a circular belt conveyor for receiving thereon a helical fiber sheet for needling, the conveyor being centered on a vertical axis and having a radial slot opening out under the circular conveyor to unwind continuously the fiber sheet received on the conveyor, the slot opening out under the conveyor towards a substantially straight chute that extends vertically between the conveyor and a support tray of the needling table centered on the vertical axis of the conveyor so as to take up the sheet unwound from the conveyor and bring it onto the needling table, the support tray having means for driving the fiber sheet in rotation about the vertical axis.