A dynamic environment with some predator robots and one prey and the artificial immune algorithm with elitism and artificial neural network（AIAE-ANN） behavior decision-making system are constructed.The AIAE is used to optimize the connection weight values of this neural network

which made the performance of the neural network to be evolved continuously and finally a behavior decision-making system with good performance can be obtained and the predator robots encircled the prey.Simulation experiments show the feasibility and validity of the given algorithm in the research of the multi-robot system in the pursuit game.