The invention relates to a packing box which comprises a box body, a first box cover, a second box cover, a first swing cover and a second swing cover, wherein first notches are formed in the surfacesof the first swing cover and the second swing cover, the opening directions of the two first notches are opposite to one another, breakpoint knife lines are arranged on the surfaces of the first swing cover and the second swing cover, the breakpoint knife lines horizontally extend from the direction of the first box cover to the direction of the second box cover, a first adhesive tape is arrangedon the inner surface of one side, far away from the box body, of the first box cover, an easy-to-tear strip is horizontally arranged on the surface of the first box cover, two ends of the easy-to-tear strip are flush with two ends of the first box cover or exceed two ends of the first box cover, one end edge of the first box cover is bonded with one end edge of the second box cover through the first adhesive tape, and the bonding part of the first box cover and the second box cover is located at the position of the first notches. The packing box provided by the invention solves the problems of high manufacturing cost, unstable stacking and poor anti-theft performance.