In order to meet the dual demand of cracking easily at low temperature in winter and stable at high temperature in summer in the cold regions in the north, the petroleum asphalt for No. 90 Road has excellent low tenderness and toughness. It has become the core material selection of main roads, normal expressway auxiliary roads and heavy load park roads in northern cities. Penetration of the product 90-120(0.1mm), more flexible than No. 70 asphalt, ductility (10℃)≥70cm, it can still maintain good elasticity under -20℃ low temperature environment and effectively resist pavement cracking caused by freeze-thaw cycle; meanwhile, the softening point is ≥ 45℃, and the high-temperature stability can meet the use requirements of medium-high traffic section.