The Industrial Cyber-Physical System(ICPS) is increasingly connected to the infrastructure, meanwhile, whose communication network is vulnerable to environmental interference and false data injection attacks. This paper studies a multi-channel transmission framework and minimax controller to improve the elasticity of ICPS under attack, environment interference and noise interference. The minimax controller is designed to enhance the elasticity of ICPS under noise and interference. Furthermore, based on the multi-channel transmission framework, an attack-defense game model between the transmitter and the attacker is established, which use the attack-defense game strategy to realize the elastic defense strategy of the whole ICPS. Through the joint debugging simulation of OPNET and Matlab, the performance of the ICPS control system based on the multi-channel transmission framework under data injection attacks is simulated. The simulation results show that the elastic defense strategy composed of the minimax controller and the multi-channel transmission framework can not only improve the stability of the system under environmental interference, but also reduce the impact of data injection attacks on ICPS effectively.