Abstract: Nadic anhydride was synthesized by the reaction of maleic anhydride with cyclopentadiene obtained from the cleavage of dicyclopentadiene.Suitable synthesizing conditions were determined by examining the effects of reaction temperature and time,the ratio of maleic anhydride to cyclopentadiene,the different solvents and their dosage on the yield and melting point of the products.The structure of the product was also discussed by IR and HNMR of the product.Reliable information was provided for industrial production.