A one-piece anti-theft backpack is an ingenious design with a double-layer explosion-proof zipper running through the whole bag, with level 5 cut-proof fabric, TSA code lock, lockable buckles, and RFID information shielding technology to create a comprehensive anti-theft security system. Meanwhile, it realizes the conversion between three-dimensional contouring to a flat-folding one, the volume of the backpack after flattening and folding is reduced by 55 % relative to the original. This backpack aims to solve user's travel items storage, property anti-theft, and save space occupation for home storage.