With the rapid development of the economy and the rise of peoples con-sumption level, the problem of garbage is becoming a more and more severe challenge. Meanwhile, colleges, as a place with a high concentration of stu-dents, have also more serious garbage sorting problems. Therefore, this paper will be devoted to analyzing the factors that influence college students gar-bage sorting behavior in the post-epidemic period. To start with, a question-naire based on the Theory of Planned Behavior (TPB) model was made to collect students data. Then the KMO tests and AMOS Structural Equation Fitting were conducted to verify the validity of the data and structure. After confirming that the data is effective, the data will be analyzed by building models including the Measurement Model of Empirical Analysis Framework, Overall model fitting, Theory of Reasoned Action (TRA) model and original Model. Lastly, with the optimization of the mediation effect and confirmatory factor analysis, the conclusion can be drawn that the student participants tend to adopt garbage-sorting behavior in both willingness and action. And the results show that they also have a positive attitude, good subjective norms, and strong perceived behavior control for the garbage sorting behavior on campus.