This paper attempts to analyze the reasons for the low quality of food in hotel catering department by causal analysis.

It is because the hotel catering department is not strict enough in controlling the quality of food. Causal analysis, also known as retrospective method or factorial method, is a scientific analysis method to judge the causal relationship between things or phenomena, and it is also a scientific method to find unknown reasons from known results. The quality of the analysis is not high, which proves that there is a problem.