Key-Value local storage method and system based on solid state disk (SSD)

The invention discloses a Key-Value local storage method and a Key-Value local storage system based on a solid state disk (SSD). The method comprises the following steps of: 1, performing read-write separation operation of a memory on data by adopting a memory snapshot B+ tree index structure; 2, performing first in first out (FIFO) queue management and caching on the indexed data aiming at a B+ tree; and 3, performing read-write operation on the data. Mapping management of logical page number and physical position is realized through an empty file mechanism in the log type additional write-in data.