Sealed storage box

The utility model provides a sealed storage box, and belongs to the technical field of storage boxes. The problems that an existing storage box is poor in sealing performance and structural stability and inconvenient to use are solved. The sealed storage box comprises a box cover and a box body with an opening, the box cover is used for sealing the opening of the box body and detachably and fixedly connected with the box body on the box body, and an assembly structure capable of enabling the box cover and the box body to be in sealed fit is arranged between the box body and the box cover; the edge of an opening of a box body is provided with an outwards-protruding extension wall, the peripheral edge of a box cover is provided with a vertical surrounding part, the vertical surrounding part is provided with an inner groove, and the extension wall of the box body is inserted into the inner groove of the vertical surrounding part of the corresponding box cover so that the box body and the box cover can form assem