Packaging container

The invention provides a packaging container with a sealing function. The packaging container comprises an open box body and a cover body, a boss part is arranged on the peripheral side of a box opening of the box body, a protruding part is arranged on the peripheral side of the cover body, and the boss part and the protruding part are sequentially bent outwards in the radial direction of the box body and the radial direction of the cover body to form a vertically-extending inner side wall, a vertically-extending top wall and a vertically-extending outer side wall which correspond to each other; in the covering state, the boss part is matched with the protruding part in shape, the outer side wall of the boss part abuts against and makes contact with the inner surface of the outer side wall of the protruding part, and a clip enabling the inner side wall of the boss part and the inner side wall of the protruding part to abut against each other is arranged between the outer surface of the inner side wall of the