The invention discloses a salt-tolerant efficient denitrification-type microbial preparation for water treatment. The microbial preparation consists of the following components in percentage: 2.5-5% of halophilic archaea, 5-10% of bacillus subtilis, 5-10% of pseudomonas denitrificans, 5-10% of halomonas and 5-10% of halophilic bacteria, and 5-10% (w / t) of bamboo charcoal particles are added. The microbial preparation for water treatment consisting of halophilic archaea, pseudomonas denitrificans, bacillus subtilis, nitrifying bacteria, denitrifying bacteria and coryneform bacteria still has good denitrification capacity under the condition of high salt, and solves the limitation of a high salt environment on traditional biological denitrification methods. The bamboo charcoal particles have good adsorption performance because of large specific surface area, can be in direct contact with microorganisms better, and can adsorb organic matters on the surface, so that the formation of a surface biological membrane is promoted; and on the other hand, a large amount of oxygen can be stored in the bamboo charcoal particles, so that oxygen-containing components in a water area are improved, and a water area recovery effect is improved.