Packaging box

The utility model relates to the technical field of packaging, and discloses a packaging box which comprises a box body, the box body comprises a box top, a side wall and a box bottom, the box top and the box bottom are oppositely arranged, the side wall is located between the box top and the box bottom, one end of the side wall is connected with the box top, and the other end of the side wall is connected with the box bottom. The box top, the side walls and the box bottom define a containing space used for containing contents. Wherein at least the outer surface of the side wall and/or the outer surface of the box top are/is provided with a temperature-sensing color-changing label. The temperature-sensing color-changing label is arranged on the outer surface of the packaging box and can sense the temperature of the packaging box, the temperature of the packaging box is reflected through the color of the label, the effect of prompting the temperature is achieved, a consumer is reminded, the risk that the consu