At the end of 2019 the world experienced a great unexpected change by the generation of the pandemic caused by the COVID-19, where companies and consumers experienced changes in order to face this situation. The objective of this research was to conduct a study of online food sales businesses and consumer behaviour derived from the pandemic COVID-19 in the state of Hidalgo, Mexico, in order to understand these changes, detect areas of opportunity and establish improvement strategies that strengthen this type of post-pandemic businesses. A quantitative, descriptive and cross-sectional methodology was used, a convenience sampling was carried out with 120 cases and the measurement instrument used was based on the survey conducted by Huaman, Nuñez and Untama using the Likert scale, with which information of a social, personal, labour income, quality of care and bio safety nature was obtained [20]. The main results of the study indicate that there is a significant change in consumer behaviour with respect to online food businesses, especially in the form of online and physical purchase, as well as in the bio safety factor.