25-interface high-speed backplane

The invention discloses a 25-interface high-speed backplane, and relates to the design technology of the server backplane. The structure of the 25-interface high-speed backplane is a PCB (Printed Circuit Board), wherein the PCB is provided with a controller, 25 hard disk interfaces and one CPLD (Complex Programmable Logic Device); PHY (Physical) 11-35 is an SAS (Serial Attached SCSI) downgoing signal in the high-speed backplane; the controller is connected with the 25 hard disk interfaces through the PHY11-35; 25 hard disks can be supported through the 25 hard disk interfaces; meanwhile, the hard disk interfaces are connected with the CPLD; and the controller is in control connection with the CPLD. The 25-interface high-speed backplane can support 25 2.5-inch 12G SAS/SATA (Serial Advanced Technology Attachment)/SSD (Solid State Disk) hard disks in a backplane space which is as high as 2U (8.9cm) and enables a server to have a better data processing capability, a server transmission rate is improved, and bandwidth is increased.