Packaging box operated by one hand

The application provides a packaging box operated by one hand, and relates to the field of packaging boxes. The packaging box comprises a bottom box and an upper cover; a first side of the bottom boxis connected with a first side of the upper cover; a buckle is arranged on the second side of the bottom box, and is provided with a hook; the hook is provided with an inclined surface; a buckle bossand a buckle baffle are arranged on the second side of the upper cover; when the bottom cover is buckled with the upper cover, the buckle boss clamps the hook; and when pressure facing the inner sideis applied to the second side of the bottom box, the inclined surface of the hook is in contact with the buckle baffle to drive the upper cover to be separated from the bottom box. According to the packaging box, the bottom box can be pressed to enable the inclined surface of the hook to act on the buckle baffle and enable the hook to be separated from the buckle boss, and therefore, the one-handed operation is realized, an