The invention belongs to the technical field of environmentally water treatment and particularly relates to a water purifier for treating production wastewater of a rubber accelerator NOBS and a wastewater treatment method. The water purifier comprises a flocculating water purifier, a microbial water purifier and an enzyme preparation, wherein the flocculating water purifier consists of polyaluminum ferric chloride, polyacrylamide, ferrous sulfate and aluminum sulfate; the microbial water purifier consists of nitrobacteria powder, paracoccus denitrificans powder, thiobacteria powder, aniline degradation bacteria powder, flocculating bacteria powder, bacillus siliceous powder and bacillus subtilis powder; the enzyme preparation consists of pectinase, cellulose, oxidordeuctase, xylanase, alkaline protease and monoamine oxidase. The water purifier for treating sewage provided by the invention is good in water purification effect, quick in water purification speed, high in safety and free of secondary pollution. By using a material with a desorption capacity as a raw material, sewage is treated by being assisted by microorganisms, so that the water purifier is wide in application range, and the treated water is extremely high in transparency and can be recycled.