Automated warehouse is the logistics transit center of super-large-scale electric energy meter automatic verification system, which plays the key role in storage, transshipment and verification of the meters. This paper proposes an optimization strategy of freight flow on automated warehouse and gives the calculation and analysis of the flow of the key points. The results show that this strategy can significantly decrease the pressure of the main freight transfer line and improve the speed of freight allocation under the premise of ensuring the ability of in-out stock.