NOVELTY - A microbe bacterium deodorizer is prepared by inoculating sludge in biological filter, and injecting hydrogen sulfide and/or ammonia gas into filter. Bacteria is separated from sludge, purified, and enriched in heterotrophy and autotrophic sulfur-oxidizing bacteria culture media. The bacteria is then enriched in nitrosobacteria and nitrobacteria isolation media. The cultured bacteria in each medium are centrifuged to obtain heterotrophy sulfur-oxidizing bacteria, autotrophic sulfur-oxidizing bacteria, nitrosobacteria and nitrobacteria; and are mixed to obtain the microbe bacterium deodorizer.    USE - Method of preparing microbe bacterium deodorizer.    ADVANTAGE - The method can process a mixture of hydrogen sulfide and ammonia gas, which is 5% higher than using microbe bacterium deodorizer having only one gas deodorizing effect. The obtained deodorizer has strengthened stability and increased working efficiency.    DETAILED DESCRIPTION - Preparation of microbe bacterium deodorizer comprises inoculating an active sludge of sewage disposal plant into a biological filter which uses active carbon as filler, and injecting hydrogen sulfide and/or ammonia gas into the biological filter. The sludge is inoculated on heterotrophy sulfur-oxidizing bacteria culture medium, autotrophic sulfur-oxidizing bacteria culture medium, nitrosobacteria isolation medium, and nitrobacteria isolation medium. The ascendant bacteria is separated, purified, and enriched in the heterotrophy sulfur-oxidizing bacteria culture medium and autotrophic sulfur-oxidizing bacteria culture medium. The ascendant bacteria is then cultured for enrichment in the nitrosobacteria isolation medium and nitrobacteria isolation medium for 3-5 times. The cultured bacteria in each medium are centrifuged to obtain the heterotrophy sulfur-oxidizing bacteria, autotrophic sulfur-oxidizing bacteria, nitrosobacteria and nitrobacteria; and are mixed at respective weight ratio of 2:10:1:1 to obtain the microbe bacterium deodorizer.