Bioactive pit mud and preparation method thereof

The invention relates to bioactive pit mud and a preparation method thereof. The bioactive pit mud which has rich and pure pit mud smell and thick ester aroma is prepared by carrying out fermentation on the raw materials such as a pit mud culture solution, by-products obtained in liquor-making, yeast for making hard liquor, fresh apples, pears, soybean cake powder, roasted soybeans, sesame seeds as well as functional bacteria and nutrient salts for a long time. The bioactive pit mud contains rich and eugonic liquor-making microbes, is harmonious in nutritional ingredients, provides a microbial source for making liquor, and is more beneficial to implementation of polymicrobial co-fermentation. 种生物活性窖泥及其制备方法，利用窖泥培养液、酿酒副产物、大曲、新鲜的苹果、梨、豆饼粉、焙炒的黄豆、芝麻以及功能菌、营养盐类等物质为原料经过长期发酵而成的有浓郁纯正窖泥气味，酯香味浓郁的生物活性窖泥含有丰富生长旺盛的酿酒微生物，营养成分协调，为酿酒提供微生物来源，更有利于多微共酵的实现。