The invention relates to a special-purpose formaldehyde scavenging agent for an air purifier. The special-purpose formaldehyde scavenging agent is prepared from the following components in parts by volume: 10-50 parts of kernel extracting liquor, 10-20 parts of radix angelicae extracting liquor, 5-15 parts of pomegranate bark extracting liquor, 5-20 parts of rhizoma cyperi extracting liquor, 1-5 parts of reed rhizome extracting liquor, 1-10 parts of extracting liquor of bark of white mulberry root, 0.5-5 parts of cananga odorata essential oil, 0.5-10 parts of tea tree essential oil, 1-15 parts of propylene glycol, 10-30 parts of absolute ethyl alcohol and 30-50 parts of water, wherein the kernel extracting liquor is at least one of hawthorn kernel extracting liquor, peach kernel extracting liquor and apricot kernel extracting liquor. The special-purpose formaldehyde scavenging agent does not contain substances including chlorine and the like which are harmful to a human body, contains various components including plant flavonoid, organic acid and the like which are beneficial to the human body, is strong in pertinence of scavenging the formaldehyde, quick in speed, and specially used for the air purifier, thereby strengthening immunity of a user, killing bacteria and viruses in air and improving air quality. Besides, the special-purpose formaldehyde scavenging agent has the advantages of being nontoxic, harmless, good in formaldehyde scavenging effect, free of stimulus to the human body, suitable for long-term use, incapable of causing secondary pollution, and capable of preventing bacteria and eliminating peculiar smell.