. Aiming at the problem of charging state balance management of lithium battery, a multi-agent based battery pack consistent charging state balance scheme was proposed. Firstly, the multi-agent control strategy is introduced into the sagging control of battery management, and the autonomous balancing under the active balancing circuit topology is realized. Secondly, the lead follower model is established, and the virtual agents with known parameters are used to make the state of each battery with inconsistent charge state close to it, so as to achieve the charge state balance in charge-discharge mode. Finally, simulation verification of the two-order multi-agent state load balancing control strategy is carried out. The experimental results show that, compared with the first-order balancing control strategy, the autonomous balancing time is reduced by 43%, the balancing time in charging mode is reduced by 68.95%, and the balancing time in discharge mode is reduced by 32.9%. The multi-agent system can achieve the balance of SOC in battery balancing management, effectively reducing the convergence time of SOC reaching the consistency of lithium battery.