The present invention discloses a foldable packing box with a foldable honeycomb structure, which includes a foldable box body with two pairs of opposite side walls, two connecting plates and the foldable honeycomb structure arranged in said foldable box body; the two connecting plates are respectively connected with one pair of opposite said side walls of the box body, the foldable honeycomb structure is arranged between the two connecting plates and connects with them; the foldable honeycomb structure includes multiple pieces of flexible cardboard with adhesive and non-adhesive parts arranged at intervals on each flexible cardboard; the adhesive parts of adjacent two the flexible cardboards are pasted together to form joints, and holes are formed between adjacent the non-adhesive parts; a top of the foldable honeycomb structure is provided with a receiving slot matching articles to be stored. The packing box with foldable honeycomb structure protects the conveying articles and avoids damage.