The invention relates to an orienting sorting ordering feeding system for fresh food corncobs and an orienting sorting ordering method thereof. The feeding system comprises an ordering feeding device I, a signal-row transmission device II, an on-line size and direction detection device III, an orientating sorting device IV, a corncob recovery device V, a forward-direction single-row transmission device VI, a reverse-direction single-row transmission device VII and a computer VIII. The ordering method includes: (1) a step of tiling, ordering, grouping and feeding stacked fresh corncobs through the automatic feeding device I; (2) transmitting the corncobs dropped from the automatic feeding device I through the signal-row transmission device II in a single row manner; (3) subjecting the corncobs transmitted on the signal-row transmission device II to on-line size detection, shape detection and direction detection through the sorting device IV; and (4) sorting and ordering the fresh corncobs by the orientating sorting device IV under the control of the computer according to the detection results of the sorting device IV, transmitting corncobs with unqualified sizes to the corncob recovery device V through rotation of a poking wheel on the orientating sorting device IV; transmitting corncobs with qualified sizes and a direction reverse to the set direction into the reverse-direction single-row transmission device VII, and transmitting corncobs with qualified sizes and the same direction as the set direction into the forward-direction single-row transmission device VI, thus achieving sorting ordering feeding of the fresh corncobs.