Abstract: The research process and methods of the blue mandarin flavor syrup shelf life prediction model were mainly described and the multi-dimensional quality changes and shelf life of the blue mandarin flavor syrup during storage were evaluated and predicted by this article. Through the analysis of sensory indicators, soluble solid content, pH, reducing sugar content, 5-hydroxymethyl-furfural (HMF) content and other indicators, combined with the kinetic model and the arrhenius equation, the shelf life prediction model was completed at 4, 27 and 37 ℃. The results showed that the sensory score of 80 points, the soluble solid content of 85%, the pH of 2, the reducing sugar content of 100%, and HMF content of 35 mg/kg were taken as the end of the shelf life of blue mandarin flavor syrup. Under 4 ℃ refrigeration conditions, the theoretical shelf life of blue mandarin flavor syrup was about 48 months. Under 20 ℃ room temperature, the theoretical shelf life of blue mandarin flavor syrup was about 24 months, and unacceptable loss of the quality of blue mandarin flavor syrup was appeared at the end of the shelf life. A new idea for the prediction and modeling of the shelf life of syrup products was provided by the establishment of the prediction model for the shelf life of blue mandarin flavor syrup.