1. The applications of flavoring and essence. can be used as fruit flavors, floral fragrance reconcile the use; can be used as fragrance mixture used in soap, shampoo, detergent, daily cosmetics; a variety of cinnamic acid esters (such as A, B, C, D, etc.) are used as a fixative agent for beverage, candy, wine and other foods 2. application of food additives: Enzymatic synthesis of cinnamic acid by microbial L-phenylalanine, L-phenylalanine is an important food additives - aspartame sweetness (Aspartame) of the main raw material. Synthesis of cinnamic acid or capsaicin, a component of the enzyme - acid hydrolase, you can use pepper cultivation of transgenic varieties. 3. Pharmaceutical Industry, can be used for synthesis of important drug treatment of coronary heart disease and heart pain set satisfying lactate levels, and synthesis of baclofen and cinnamon benzene piperazine, used to make "heart to security", local anesthetics, fungicides , hemostatic and so on. Baclofen can also be synthesized and cinnamon benzene piperazine, as a ridge of bone loose cone and anticonvulsant agents. Mainly used for cerebral thrombosis, cerebral arteriosclerosis, coronary artery disease and other illnesses. Lung adenocarcinoma cells significantly inhibited. 4. The application in beauty: Cinnamic acid inhibit the formation of black tyrosinase effect on the UV cut off a certain role, they are the essential ingredients of sunscreen acid antioxidant significantly slow down the appearance of wrinkles for good effect. 5. The application of organic chemical synthesis: cinnamic acid can be used as sustained release of galvanized sheet, PVC heat stabilizers, multi-urethane cross-linking, poly caprolactam flame retardants, chemical analytical reagent. Also the determination of uranium, vanadium separation reagents; it is the most important negative-type photosensitive resin, synthetic raw materials. Used in plastics, can be used as PVC heat stabilizers, mold sterilizing deodorant, but also added to the rubber, foam made of odor in the shoes and insoles, can also be used for cotton and various synthetic fibers, leather,paint, shoe polish, mats and other products to prevent mildew. 6. Cinnamic acid is used as a crop pesticide industry growth promoter, long-acting fungicides.