Phenylacetic acid is an intermediate of organic synthesis such as medicine, pesticide and perfume. It is used in the production of penicillin, dibazole and other drugs in the pharmaceutical industry. Phenylacetic acid was obtained by chlorination and esterification α- Ethyl chlorophenylacetate is used in the production of Daofeng powder and ethyl Daofeng powder, which are broad-spectrum organophosphorus insecticides. Phenylacetic acid itself is also a pesticide plant growth hormone. Phenylacetic acid widely exists in grapes, strawberries, cocoa, green tea, honey and so on. Phenylacetic acid has sweet honey taste at low concentration and still has sweet taste below 1ppm. It is an important spice component. Phenylacetic acid also has strong bactericidal effect.