Disclosed is a packaging box which includes a box body. The packaging box includes a cavity defined in the box body and a side wall surrounding the cavity, a support frame that disposed on an inner side of the side wall, and a bottom plate that is disposed in the cavity and at an end of the support frame. The support frame is integrated with the box body, an opening is provided in the box body, and the support frame is formed by bending the side wall located at the opening toward the cavity.