In order to obtain a new product of DMC,added the different quanlity proportions into gasoline.Filtered a gasoline antiknock formulations of the configuration reasonable with DMC,octane number increased significantly and more economical.The result showed that added 4.7%(mass percentage) DMC into gasoline could increase 3~6 points of octane number.Inceased the blending proportions of DMC,the octane number was not changed.