Petroleum resin has many advantages, but also has some disadvantages, such a high brittleness, poor filming-forming performance, being short of polar groups in structure and deep color, which restricts its application in various fields.By adding aromatics into 1,3-pentadiene resin, lowering the softening point of 1,3-pentadiene resin to 90 degree C, and improving its compatibility, the practical application effect was enhanced.