Abstract: A new process was developed for synthesis of acrylated alkyd resin in which a methyl methacrylate (MMA) is copolymerized with a maleinized alkyd resin.The effect of the concentration of MMA and initiator, addition methods on the film properties has been investigated.It was showed, compared with the conventional modified alkyd resin, the MMA modified alkyd resin made by the new process is superior in appearance of film, impact resistance and resistance to petrol.The new process broadens the materials source of modified alkyds, reduces the cost of product.The satisfactory formulations are obtained with 30%-40% of methyl methacrylate, 3.0% of initiator and 60%-70% maleinized alkyd resin.The key technique in this process is the addition method, which MMA and based alkyd are added into reactor together, and initiator is introduced into the reacted mixture gradually in four hours.