Abstract: This paper deals with mainly the technological process of the microcapsula pesticide made by means of coacervation and interfacial polymerization, determination of physical-chemical properties and its application in forestry. Control test and gas chromatographic analysis have proved that the physical-chemical properties are stable of the three microcapsules, deltamethrin, fenva-lerate and sumithion after one year’s preservation. Various cerambycids pests in forestry can be controlled with the machinery spray of microcapsules, with the property of controlling the release of pesticides, microcapsules are better in effect, longer in residual action and lower in toxicity than such as emulsion for identical pesticides. Microcapsule can develop ideal formulation of process pesticides.