question: We take the development of retail formats under COVID-19 as an example, using online search data to establish a retail format index to reflect the impact of online retail formats and trends of the impact under COVID-19. Therefore, a time series model of the retail format index was established to achieve an ideal forecast effect, and a short-term dynamic forecast of the impact of COVID-19 offline retail formats was achieved. Based on the special nature of the new online business format, we start from online fresh food, online education, and online office, we use online search data to construct a retail format index. It also has a certain significance to analyze the retail format data statistics, predict trends, and study the impact of COVID-19 on the retail format. © 2021 ACM.