The invention relates to the technical field of food packaging, in particular to a paper foldable food packaging box. The paper foldable food packaging box comprises a paper box body, the bottom faceof the interior of the paper box body is provided with a bottom plate, the bottom plate comprises two same first rotary plates, and the first rotary plates are rotatably connected with each other through a pin shaft. A placing plate is arranged above the bottom plate, the two ends of the placing plate are provided with strip-shaped notches, the bottom face of the placing plate is provided with a plurality of supporting rods which are in contact with the bottom plate, second side plates are inserted into the strip-shaped notches correspondingly, and a first side plate is arranged on the inner wall, perpendicular to the second side plates, of the paper box body. The paper foldable food packaging box is provided with the placing plate where take-out packaging boxes can be placed, through protection of the second side plates and the first side plate, the damage of collision and shaking to food can be effectively avoided, and the paper foldable food packaging box is convenient to clean, canbe utilized repeatedly, and can save resources.