Considering tracking a target in large scale by mobile agents, to accelerate the convergence speed and improve tracking consequence, a flocking control algorithm based on Levy flight is proposed. Taking advantage of Levy flight, search agents are added, which can detect and search the target, and the agents adjust their motion according to information of neighbors and target. Simulation results show that the algorithm based on Levy flight can search the target faster and track it better than the traditional flocking control algorithm. The control algorithm proposed can be applied to target tracking in large scale by mobile agents.