The invention belongs to the technical field of feces deodorizing, and relates to a feces deodorant and a using method thereof, in particular to a rural latrine feces deodorant and a using method thereof. The feces deodorant is obtained by adopting rice husk or wheat bran as a raw material for carbonizing and using microbiological technology for biological fermentation. The feces deodorant has theadvantages of simple operation, easy-to-get raw material, low cost, protruding effect and obvious ecological benefit, metabolism of microorganisms in the process of biological fermentation can be utilized to degrade and utilize stink-generating sulfide and amine substance in night soil, breeding of other bacteria and pathogenic bacteria is inhibited, infection source mosquito disease spread is cut off, rural environment is improved, and resource utilization efficiency is improved.