The invention provides an SATA interface transfer method with an attenuation compensation function, and relates to an SATA interface transfer technology. When an SATA signal needs to be transferred through a connector, a specialized high-speed difference buffer circuit is additionally arranged at the front end of the connector, and modification and compensation are conducted on the SATA signal. By means of the SATA interface transfer method with the attenuation compensation function, limitation of an SATA channel on routing length and transfer frequency can be broken through, and after the method is used for a product, the layout and installation flexibility of storage modules such as hard disks, optical disc drivers and the like based on the SATA interface in the product can be effectively improved.