The invention discloses a page-level buffer improvement method based on a classification strategy. The method comprises a request type distinguishing module, a hot data page storage area module, a cold data page storage area module and a continuous data page storage area module. The method comprises the following steps: firstly, dividing a hot data page cache into the hot data page storage area module, the cold data page storage area module and the continuous data page storage area module, and separately using the modules to load data pages of a request with frequent accesses, the data pages of a request with lower access frequency and the data pages of the request with high spatial locality; secondly, arriving at the continuous data page storage area module by prefetching multiple continuous data pages; and finally, when the data page cache is full, preferably replacing least recently used (LRU) clean pages in the cold data page storage area module, and if the cold data page storage area module does not have dirty pages, replacing the dirty pages. Compared with a page-level LRU algorithm, by adopting the page-level buffer improvement method disclosed by the invention, the responseperformance to continuous loads can be improved, and the read and write overheads of flash memories can be effectively reduced.