The invention relates to an insecticide composition. The active ingredients in the insecticide composition are pueraria peduncularis extracts and veratrine according to the weight ratio of 1:6 to 6:1. The insecticide composition can be further prepared into a microemulsion. Compared with a single preparation, the insecticide composition has a certain synergistic effect; meanwhile, the cost is low; the toxicity is low; the drug resistance of the pest can be reduced, and the like. Agricultural pests such as cabbage caterpillar, plutella xylostella, maize army worm, toxoptera aurantii and smaller green leaf hopper can be effectively prevented and controlled.