To solve the issue of climate change caused by the emission of carbon dioxide, the “dual carbon” goal in 2020 is proposed. Under the requirement of “dual carbon” goal, the high-quality development of petrochemical industry in Liaoning Province was facing challenges such as the immaturity of carbon substitution and carbon capture technology (CCUS) and the irrational industrial structure. On the basis of analyzing the characteristics of the petrochemical industry in Liaoning Province, it is proposed that the petrochemical industry should take the path of high-quality development by vigorously developing CCUS technology, adjusting the types of raw materials in petrochemical industry, promoting the adjustment of the energy structure, optimizing the industrial structure, promoting the application of scientific and technological achievements, and etc.