The invention provides air purifying liquid.The air purifying liquid is prepared from, by weight, folium isatidis, fructus forsythiae, radix isatidis, honeysuckles, herba eupatorii, spathiphyllum kochii, herba nepenthes mirabilis, brown sugar and a lung-clearing fruit enzyme, wherein the lung-clearing fruit enzyme is an active enzyme formed by carrying out pickling, fermentation, filtration, alcoholization and extraction on one or more of grapefruit, onions, pineapples, oranges, pears, lemons and apples.A preparing method includes the steps that folium isatidis, fructus forsythiae, radix isatidis and honeysuckles are mixed and ground into powder； herba eupatorii is ground and distilled to obtain an extract； spathiphyllum kochii is put into insect-catching cages of herba nepenthes mirabilis, herba nepenthes mirabilis is put into a container to be boiled, and decoction is collected； the fine powder and the extract are added into the decoction, and the mixture is boiled again, cooled and clarified； clarified liquor and the lung-clearing fruit enzyme are mixed and uniformly stirred.The air purifying liquid dissolves hazardous substances in air, settles dust particles, clears peculiar smell of the air and improves air quality when sprayed into the air, and meanwhile the air purifying liquid can adjust mucosae of the respiratory system of the human body and clear the lungs of the human body.
