In order to reduce the land cost of the warehouse, improve the competitiveness of enterprises. One of the approaches increasing space utilization is to reduce passageway as far as possible. Compared with single-double rack, doubledeep rack can save half passageway space, hence can realize more compact warehousing. Firstly, an interleaving time model, for which both the run time of automated crane and the handling time of stacking crane are taken into consideration; secondly, a dynamic storage optimization method is put forward, which, in relation to random storage method, can shorten interaction time, and reduce reshuffle as far as possible; at last, simulation experiment is carried out, which indicates that the optimized storage method can improve operation efficiency.