Abstract: Digital transformation serves as a powerful engine to promote the development of the petrochemical industry toward green, low-carbon, and high-quality. In this paper, an overview of the background of digital transformation is provided, the main problems being encountered in the production and operation phases of the catalytic cracking unit is analyzed, and a digital transformation application case of "catalytic cracking unit level" is elaborated on. A practical example of a catalytic cracking unit of SINOPEC is introduced with highlighting the implementation process and application effect of digital transformation on a green, stable and high efficient operation. Finally, the prospects of the key development direction of digital transformation in the petrochemical industry is proposed.

Key words: catalytic cracking unit, digital transformation, green and low carbon, intelligent management