Sealed electrical cassette

The utility model provides a sealed electrical cassette which comprises a cassette body, and the peripheral wall of the cassette body is provided with a plurality of threading holes which are communicated with the inner cavity of the cassette body and are used for allowing wires to pass through. The threading hole is connected with a sealing element made of an elastic material, the sealing element is provided with a first convex ring arranged in a rectangular shape, and two end surfaces of the first convex ring respectively extend to the inner side and the outer side of the cassette body in the radial direction; and a puncture part is arranged in the first convex ring and is used for being punctured by a sharp instrument and allowing a wire to penetrate through. When electric wires with different wire diameter specifications are installed, the puncture part is punctured by a sharp instrument to form a notch, and then the electric wire passes through the notch of the puncture part. The sealing element made of