Patent ID: 8141771

Claim:
A packaging carton box structure, comprising: a first sheet, comprising: a first substrate, having two first side edges and two second side edges; two first side plates, respectively connected to the first side edges, the first side plates being respectively bent to form inserting portions, and an outer side of each of the first side plates comprises a pre-tearing portion; two first extending plates, respectively connected to the second side edges; and a plurality of first joining plates, connected to the first extending plates, the first extending plates being bent towards the first substrate, the first joining plates being respectively inserted into the inserting portions; and a second sheet, comprising: a second substrate, having two third side edges and two fourth side edges; and two second extending plates, respectively connected to the fourth side edges, the second extending plates being bent towards the second substrate, and respectively positioned on the first extending plates, such that the second sheet covering the first sheet to form an accommodation space, wherein when the pre-tearing portions are torn off, the first joining plates are released from the inserting portions, so as to unfold the first sheet.