Abstract:Project-based learning is an important model of emerging science education, which has become an important research field in the field of learning science in recent years. However, its development in China is facing difficulties. On the one hand, it is restricted by China's educational conditions, onthe other hand, it is restricted by the problems existing in traditional project-based learning. In the context of the development of online education, project-based learning course based on computer simulation can make up for the deficiency of traditional project-based learning course and achieve the goal of oriented literacy education. Starting from the steps of computer simulation design unit, this paper clarifies the roles of designers, students and technology in each step. This paper analyzed the principles and problems that should be paid attention to in the design of computer simulation unit of project-based learning course from the dimensions of model design, interaction design and evaluation design, and provided guidance for improving and better realizing the goal of project-based learning.