Abstract: Operating system experiments is an important part of the operating system courses to help students understand the operating system concepts and principles from the coding level.In this paper,we discuss the content of the experiment and the design of the student achievement evaluation method in combination with the teaching needs and training direction.The contents of the experiment are introduced in the form of preparatory experiment,verification experiment,simulation experiment and exploration experiment,and the principle of code review is introduced into the student achievement evaluation through the principle of experiment understanding.