The invention discloses an alpha-
cypermethrin suspension preparation containing
vegetable oil and derivatives thereof, as well as a preparation method and application of the alpha-
cypermethrin suspension preparation. The alpha-
cypermethrin suspension preparation comprises the following components in percentage by weight: 1-50% of alpha-cypermethrin, 1-40% of
vegetable oil and derivatives thereof, 0.5-10% of
wetting agent, 0.5-10% of dispersant, 2-15% of emulsifier, 0.05-5% of thickener, 0.05-5% of defoaming agent, 1-10% of anti-freezing agent, 0.1-10% of
preservative and the balance of water, wherein the water is supplemented till 100%. The alpha-cypermethrin suspension preparation disclosed by the invention has the advantages of
evaporation resistance, strong spreading and
adhesive capacity of a medicament, strong permeability and the like by improving the original composition and adding the
vegetable oil and the derivatives thereof, so that the
biological activity of an original preparation product is improved, the using effect of the preparation in a field is significantly improved, and the preparation is used for controlling lepidoptera and
hemiptera pests against a variety of crops.