The invention discloses a top cover sealing device and a container with the same. The top cover sealing device is applicable to the open top container comprising two top covers, and is arranged at thegap between the two adjacent top covers. The top cover sealing device comprises a cover plate, end walls and a first sealing part; the cover plate covers the gap and is attached to the tops and sidewalls of the top covers; the end walls extend downwards from the cover plate and are arranged at the two ends, at the outer end of the container, of the cover plate; and the first sealing part is arranged below the cover plate and extends downwards into the gap. According to the top cover sealing device, a container body can be completely sealed, the two-cover container can be sealed on the premise of not changing the opening size of the covers, and the cover opening sequence of the container is not limited. The top cover sealing device can be applied to sealing of non-planar covers, and the requirement for the manufacturing precision of the two-cover container is effectively reduced.