The invention discloses an additional part of a tea packing tool, and particularly relates to a sealing cover of a tea caddy. The sealing cover comprises a cover body with an inner cavity, wherein a flange capable of being pressed on the platform surface of the upper end of a caddy body is arranged at the periphery of the upper end of the cover body, and at least one shifting sheet extending towards the outside of the cover body is arranged on the flange. After the structure is adopted, on the basis of no change of the conventional sealing cover structure, the more than one shifting sheet is arranged on the flange directly, when the sealing cover is opened, each shifting sheet can be pulled by using the hand to open the sealing cover, and thus the sealing cover can be conveniently and rapidly opened and a good sealing effect is achieved between the sealing cover and the caddy body; and the sealing cover has a simple structure, is convenient to operate, saves the time and the labor, and is convenient and practical.