Fermentation liquid with air purification function as well as preparation method and application thereof

The invention relates to a fermentation broth with an air purification function and a preparation method and application thereof.The preparation method comprises the steps that a lactic acid bacteria strain and a saccharomycetes strain are taken, a nutrient solution is taken and inoculated with the lactic acid bacteria strain and the saccharomycetes strain, and after fermentation is conducted for 24 hours at the temperature of 38 DEG C, a compound probiotic strain is obtained; carrying out expanding propagation on a micro-ecological compound probiotic strain; the preparation method comprises the following steps: preparing probiotic fermentation liquor, weighing fermentation raw materials, wheat bran, white granulated sugar, tap water, Chinese dates, apple juice and a micro-ecological composite probiotic strain, stirring, mixing, carrying out sealed fermentation, transferring early-stage fermentation liquor into an after-ripening tank, and after-ripening, obtaining the required probiotic fermentation liquor. A