In this paper, we focus on circle formation control of multi-agent systems(MAS) with a leader. The circle formation is achieved based on the lead-following and the artificial potential field method. A distributed control law is given to make a group of agents form a circle and consequently achieve an expected angle. Finally, simulation results show that the proposed circle formation strategies are effective. In this paper, we focus on circle formation control of multi-agent systems (MAS) with a leader. The circle formation is achieved based on the lead-following and artificialoid field method. A distributed control law is given to make a group of agents form a circle and achieved achieve an expected angle. Finally, simulation results show that the proposed circle formation strategies are effective.