A new high-temperature resin system based on methylene dianiline bismaleimide (MDA BMI) chemistry is studied. This is a two-component resin system which is modified by 2,2’-methylene-bis[4-methyl-6-(2-propenyl)] phenol (MBMPP) and has excellent thermal mechanical properties and good toughness characteristics. This paper discusses in detail some of the characteristics of the prepolymer by reacting the two components in addition to the cured system’s properties. The prepolymer has very good stability at 100-120 degrees C with very minimal molecular weight increase,The reaction order for curing prepolymer is almost 1. The activation energy of the curing reaction is 74.12 KJ/mol. The flexural strength and modulus of the cured modified MDA-BMI and their retention at 250 degrees C are 124 and 3774.6 MPa and 69 and 78%, respectively.