Sealing packaging box convenient to assemble

The utility model discloses a sealing packing box convenient to assemble, which comprises a box body and a box cover, the box cover is movably connected to the top of the box body through a rotating shaft, square blocks are fixedly connected to the left side and the right side of the bottom of the box cover, and the square blocks are positioned on the front side of the box body. Through cooperative use of the box body, the box cover, the square block, the concave block, the round hole, the placing cavity, the positioning mechanism and the adjusting mechanism, the adjusting mechanism is pulled to drive the positioning mechanism to enter the cavity, and at the moment, the box cover can be opened and articles in the box body can be taken out; the packaging box solves the problems that when the packaging box is used, in order to protect articles in the packaging box, a sealed area is usually formed after the packaging box is closed, the articles are prevented from being damaged, the closed position of the packagi