The invention discloses a method for preparing manmade pit mud. According to the method for preparing the manmade pit mud, disclosed by the invention, the manmade pit mud is prepared through uniformly mixing a pit mud composite bacterial solution, yellow mud, yeast powder, dried yeast, esterified red yeast, pit bottom mud, pond mud, wheat flour, bean cakes, yeast extract, sodium acetate, ammonium phosphate, ammonium sulfate, dipotassium hydrogen phosphate and edible alcohol and then carrying out culturing, wherein the pit mud composite bacterial solution is obtained through uniformly mixing a Clostridium kluyveri JZZ CGMCC No. 11948 culture solution and a pit mud mixed bacterium culture solution. Proven by experiments, the manmade pit mud prepared by the method can be used for producing nice wine in the same year, the merit factor is increased by about 11%, the taste is pure, the perfume is thick, and the aftertaste is lasting. The method is simple in process, convenient and fast in operation and low in cost and can be popularized.