The invention discloses an automatic wine jar sealing device for baijiu production. The automatic wine jar sealing device comprises a storage tank, a cover body and a supporting plate, a support is fixed to the top end of the supporting plate, a third driving motor is installed at one end of the bottom end of one side of the support, and a molding plate is arranged in the cover body. A servo motor rotates to drive a first gear disc to rotate through a gear body, when the first gear disc rotates, work is applied to a shell through cooperation of a threaded hole penetrating through the interior and a threaded rod, and the shell is pushed to the position below the cover body; slurry falling when the shell is not used is collected through a collecting box, and when the collecting box needs to be cleaned, baffles on the two sides are pulled, springs are lengthened and deformed, the baffles are far away from the collecting box, at the moment, the collecting box is pulled out and cleaned, and after cleaning is completed, the collecting box is installed in the shell; and the collecting box is moved to the position below the cover body, and the situation that the placing stability of wine jars above a conveying belt is influenced in the later period due to the fact that when the collecting box is not used, and falling mud falls to the position above the conveying belt is avoided.