Insect-resistant pesticide for vegetables and preparation method of insect-resistant pesticide

The invention discloses an insect-resistant pesticide for vegetables. The insect-resistant pesticide is prepared by taking a folium artemisiae argyi extracting solution, an iris japonica thumb extracting solution, a melia azedarach extracting solution, an euphorbia helioscopia extracting solution, a duranta repens extracting solution, a sweet wormwood extracting solution, white vinegar and pepper spray as raw materials. The insect-resistant pesticide can effectively prevent and kill vegetable worms such as aphids and snails, and enable the vegetables to grow luxuriantly, so as to improve the yield of the vegetables. Meanwhile, the liquid drug residual period of the insect-resistant pesticide is only 8-12 days, thus being non-toxic and harmless to people and livestock. The invention also provides a preparation method of the insect-resistant pesticide. The insect-resistant pesticide disclosed by the invention is remarkable in effect, low in cost, and green and pollution-free, thus having a broad market application prospect.