Abstract: The present invention relates to a computer disc packing box and particularly to such a novel computer disc packing box comprising two pivotally-jointed seats, a plurality of disc storage bags, upper and lower covers and two cover plates, which is characterized by the following design: the grooves on the inner sides of said two opposite pivotally-jointed seats are arranged in a fan-stage stage in keeping with the inserting legs on the two sides of bottom edge of said disc storage bags for pivotal joint between said two pivotally-jointed seats, the upper and lower covers are pivotally jointed on the two ends of bottom edge of outer sides of said pivotally-jointed seats, and the cover plates with posts are fixed on the outer sides of said pivotally-jointed seats so that the upper and lower covers can be aligned and spread and that the disc storage bags also can be aligned between said pivotally-jointed seats or automatically spread in a state of fan arrangement.