The invention discloses a deodorant special for livestock and poultry farms and application thereof, wherein the deodorant is composed of the following strains: 106-108 lactobacillus acidophilus per milliliter, 107-109 lactobacillus reuteri per milliliter, 104-106 bacillus polymyxa per milliliter, 106-108 bacillus lentus per milliliter, 106-109 bacillus coagulans per milliliter, 104-106 enterococcus faecalis per milliliter, 107-109 enterococcus faecium per milliliter, 104-107 candida rugosa per milliliter, 104-107 candida valida per milliliter, 104-106 pseudomonas farinofermentans per milliliter, 106-108 rhodopseudomonas palustris per milliliter, 104-106 geotrichum suaveolens per milliliter, 106-108 aspergillus clavatus per milliliter, 106-108 rough spore aspergillus per milliliter and 106-109 streptomyces globisporus per milliliter. According to the invention, excrements in a poultry house and excrements for accumulative fermentation are treated through a spraying manner, so as to effectively reduce the release amount of malodorous gases, and provide a technical support for the effective treatment of malodor in the livestock and poultry farms and the environmental protection. Besides, the deodorant special for livestock and poultry farms can also be sprayed to the livestock and poultry body surfaces, to keep the livestock and poultry body surfaces clean and sanitary, and be conducive to the growth of livestock and poultry.