As the link between the planning layer and the execution layer, scheduling is the main component of the "intelligent refinery". This article mainly summarizes and analyzes the refinery scheduling problem from the perspective of unit production scheduling. Firstly, the current research of the refinery production scheduling model is described, and some factors considered in the current scheduling models are introduced. Secondly, various optimization methods for refinery production scheduling are summarized. Finally, combined with the development trends of information technology and intelligent manufacturing, the challenges and future research directions of refinery production scheduling are analyzed.