The invention discloses a write performance optimization method under the hierarchical hardware structure of cache strategy writing. The storage layer is stratified according to the data stratification control algorithm of the volume. HDD and SSD are used as target devices in disk manager to aggregate into virtual device Cache memory, and HDD and SSD blocks are mapped at the same time. According to the block mapping, the operation of HDD is converted to the operation of SSD, and the function of storing hot data in SSD is realized. The present invention focuses on optimizing write performance in terms of cache acceleration, When the amount of data exceeds the storage capacity threshold range, the hot and cold data are replaced to form the trend of multi-layer and multi-level interactive storage, and the resource information is dynamically integrated in real time, so as to maximize the performance improvement in physical storage and non-volatile high-speed storage under the premise of ensuring data security and consistency. At the same time, users can conveniently formulate management strategies to achieve storage resources according to their own needs.