The invention discloses a production method of sesame-flavor pit mud, and belongs to the technical field of wine making. The method comprises the following steps: mixing and wetting loess, sludge in a lotus pond, aged pit mud, fresh waste fermented grains, soya bean meal, pea meal, bone meal, pot-bottom water, yellow water and mild wine after-run according to a reasonable proportion; then, adding a proper amount of pit mud fermentation liquor, As3.951 aspergillus oryzae fermentation liquor, yeast fermentation liquor and Daqu powder for making wine into the wetted materials; lastly, fermenting and culturing to obtain the sesame-flavor pit mud. The sesame-flavor pit mud is grey brown in color, is pure in flavor, has strong aged pit mud smell, light ester flavor and wine flavor, is durable in flavor, soft, mature and fine, is free from excitation feel, is free from air bubbles on sections, is uniform in quality and free from impurities, has remarkable viscosity, and is suitable for producing sesame-flavor flavoring wine. Moreover, as proved by semi-works, the yield and high-quality rate of the produced sesame-flavor wine are increased greatly; moreover, the wine body is clear and transparent, has excellent sesame flavor, and is mellow, sweet and harmonious; the after-run is clean and has a particular sesame flavor.