The invention provides a method for SATA port reuse optimization. The method is characterized by comprising two implementation modes: S1, a static polling mode in which data disks in each SATA group are divided into first and second groups after a storage device creates RAID5, video data is written in the two groups of disks in a time-sharing manner according to a time threshold, and the video data is alternately and cyclically processed according to the time threshold of 7 days; and S2, a dynamic feedback mode in which all the disks run in a first time threshold after the storage device creates the RAID5, statistics is performed to obtain average storage bandwidth n, and in each SATA interface, the state values of the temperatures and the delays of all the data disks are sorted from low to high and marked as S1{a1...a4}, S2{a1...a4}, S3{a1...a4} and S4{a1...a4}. According to the method, the stability of a storage system can be improved and the overall service lives of the disks can be prolonged; and meanwhile, hard disk magnetic heads are ensured not to perform reading and writing at the same time, so that the service lives of the hard disks are prolonged.