There are no rules in law, but there must be rules in discipline and students should abide by them. Eating in the classroom is unsanitary, uncivilized and immoral. Everyone eats in the classroom, so the classroom becomes a canteen. A classroom is a place to study. The air inside is dry and dusty, which is not as good as the air in the restaurant. In addition, the classroom air is not fresh, which affects the learning mood, and the garbage after eating affects the sanitary environment of the classroom. Freedom is relative, freedom without discipline is not real freedom, and the freedom to eat in the classroom violates the freedom of other students to study in the classroom. It is immoral to pursue this freedom.