Collision avoidance in formation control is an essential and challenging problem in multiagent filed. Specifically, the agents have to consider both formation maintenance and collision avoidance. However, this problem is not fully considered in existing works. This paper presents a hybrid collision avoidance method for formation control. The formation control is designed based on consensus theory while the collision avoidance is achieved by utilizing optimal reciprocal collision avoidance (ORCA). Furthermore, the stability of the multiagent systems is proved. Finally, a simulation demonstrates the effectiveness of the proposed method.