The invention discloses a server cabinet blind plate. The server cabinet blind plate comprises a main body and a magnetic component, wherein a fixing buckle is arranged on one surface of the main body, and the other surface of the main body is a server mating surface; the magnetic component is fixed to the main body through the fixing buckle, and the other surface of the main body attracts the surface of a server cabinet through the magnetic component. The server cabinet blind plate can improve the utilization rate of cold air delivered by a cold channel, effectively reduce the temperature ina server and a machine room and ensure the healthy operation of equipment in the machine room. The server cabinet blind plate also has the characteristics of lightness, safety, fire protection, simplestructure and convenience in disassembly and assembly.