Disk based on database performance mainly depends on the disk IO speed. Generally, database system has a large buffer pool, where the db operations take place. Hence, the database performance depends on the size of buffer pool. In this paper, we propose a secondary buffer pool solution based on the flash memory SSD(solid state drive), which uses the high random access speed and high IOPS feature of the SSD. We implemented our solution within MySQL InnoDB. Our real machine experiments running online transaction processing workloads (TPCC) show that after enabling secondary buffer pool, the database performance will achieves up to 100% ~ 320% improvements.