The invention relates to a preparation method of mosquito net cloth. The preparation method is characterized by mainly comprising processes of weaving, dying and post-processing and specifically comprising the following steps: weaving dacron yarns and silk in a mixing manner, adding 1000-1200 parts by weight of water, 27-31 parts by weight of daphne odera, 42-52 parts by weight of slurperon, 38-42 parts by weight of cordate telosma, 25-57 parts by weight of mozzie buster, 31-41 parts by weight of fly-expelling plum, 25-40 parts by weight of fennel, 15-26 parts by weight of mint, 31-42 parts by weight of acorus calamus and 40-60 parts by weight of folium artemisiae argyi into a container, heating the components to 40-45 DEG C and keeping the components at the temperature for 110-120 minutes; and dyeing the cloth in a dyeing machine, and finally, carrying out post-treatment on the cloth. The mosquito net cloth has the advantages that the daphne odera, the slurperon, the cordate telosma, the mozzie buster, the fly-expelling plum, the fennel, the mint, the acorus calamus, the folium artemisiae argyi and the like are added into the cloth, and the mosquito net cloth can release the efficacy of the medicines slowly during the sleep of a user for a long time, and can bring each component into play, so that the mosquito net cloth can not only give out the fragrance and play a role of hypnosis, but also expel mosquitoes, thus meeting the requirements of people.