The presence of dicumyl peroxide (DCP) causes the changes in relative melt viscovity and the morphology of blend LLDPE/EVA. It raises torque momen amplitude of polymer blend at the balance state of melting of the polymers mixture. The results of TGA show that the durability against thermo-oxidation of polymer blend containing DCP is higher than that of without DCP. The SEM photographs also shows that DCP makes LLDPE and EVA phases dispersing into each other better than the original polymer blend.