Method for improving random write performance of SSD

The invention discloses a method for improving random write performance of an SSD, which belongs to the field of hard disk write performance. In a write control flow and a control circuit of Nand Flash chips, the following measures are adopted to greatly improve the write speed of the SSD: (1) paralleling originally independent Nand Flash chips used as storage media of the SSD and sharing a control logic of the Nand Flash chips but using respective data lines; (2) dividing a write operation into three steps which include addressing, data write-in and ECC according to a working principle of thewrite operation of the Nand Flash chips and forming a three-stage stream line; and (3) adding two Buffers which are used as write-in data buffers with size same as a page size of the Nand Flash chipinto the write-in stage of stream line data. Compared with the prior art, the invention greatly improves the write speed of the SSD.