Online teaching is gradually becoming an important and popular trend in education in Vietnam and around the world. In Vietnam, Political Theory subjects, with their purely theoretical characteristics, are used by universities to test and deploy teaching using online tools. The process of teaching Political Theory subjects in recent times has clarified the important roles of online tools. However, there have also been limitations that hinder and inhibit the application process, as well as the effectiveness of online tools in teaching Political Theory subjects. Identify limitations in order to provide solutions to overcome them, making online tools an effective tool besides traditional teaching methods in political theory education today.