Abstract: Most domestic research on age discrimination has been at the level of social policy and law, with less empirical research. Results from a questionnaire survey of 738 college students showed that the scores of age discrimination, negative aging stereotypes, intergroup anxiety and intergenerational contact were all significantly correlated with each other. Intergenerational contact can directly and negatively predict age discrimination, and can also influence age discrimination through the independent mediating effect of negative aging stereotypes and intergroup anxiety, as well as the chain mediating effect of negative aging stereotypes-intergroup anxiety. Increasing intergenerational contact between college students and older adults is beneficial in reducing levels of negative aging stereotypes and intergroup anxiety, which in turn reduces levels of age discrimination.