College students’ extracurricular activities are rich and varied, with the increasing number of activities day by day, the activities management is cumbersome and the task is challenging, but there is still lack of one-stop solution. To meet the needs of college students to build an activity management platform, we build user front-end of activity management platform based on Wechat mini program, back end of activity management platform based on Node.js, express, and MongoDB framework. Therefore, activities and user management are realized integrally. Its features include mailbox verification, two-dimensional code check-in, reading and writing Excel, etc. Encrypted front-end and back-end communication is realized by HTTPS RESTful API, perfectly meets the needs of students and ensures the safety of students' information, which provides convenience for the management of college students’ activities.