The subjects of economic management depend on their own characteristics. The characteristics of the discipline of economic management are marginal, which has both the technicality of engineering knowledge system and the humanity and sociality of liberal arts. Therefore, the practical teaching system of economics and management should include laboratory teaching and social direct practical teaching. The typical feature of economic management discipline is marginality. This kind of discipline covers a wide range, and even combines some contents of several traditional independent disciplines. Therefore, the discipline of economic management not only has some characteristics of natural science, but also has typical social science characteristics. The most typical feature of natural science in the discipline of economic management is the extensive use of mathematical concepts and methods. In the discipline of modern economic management, emphasis is placed on scientific management, the generalization of quantitative relations, and the excavation and summary of quantitative movement laws in social activities, especially economic activities, which makes the discipline of economic management have strong mathematical characteristics. The concept of mathematics makes modern economic management activities regard economic activities as a process of movement and change, which is a process with rules to follow; With the extensive use of mathematical methods, many economic models have appeared in the discipline of economic management to explain economic phenomena by mathematical methods. However, after all, the discipline of economic management is about explaining economy and management, and economic activity is a basic and core activity of human social activities. Therefore, the discipline of economic management has a typical social science nature. The subject of economic management has the dual nature of natural science and social science, which determines the characteristics of its practical teaching system. This is the composition of the practical teaching system of economic management discipline, which includes both the real teaching form of laboratory simulation and the completely real practical teaching form that directly enters the society. From the feasibility point of view, this can be done completely. Since the discipline of economic management has the characteristics of natural science, it also has technical characteristics. These technical features can be completely simulated and reproduced in the laboratory. In the same way, since the discipline of economic management is a typical social discipline, it is of course necessary to practice learning social content. As mentioned above, social content should directly enter the society to feel and recognize. Therefore, the practical teaching system of economic management discipline should include two basic parts: laboratory practical teaching and practical teaching directly entering the society.