Method for connecting computing blade and IO expansion card of blade server

The invention discloses a method for connecting a computing blade and an IO expansion card of a blade server and particularly relates to a direct connection mode between a computing blade and an IO expansion card of a blade server. The method comprises a middle plate, wherein the middle plate is provided with a through hole; and a blade connector of the computing blade and an IO connector on the IO expansion card pass through the through hole on the middle plate to be directly connected. By adopting the mode of cutting the connecting hole on the middle plate and by allowing connectors to pass through the connecting hole, the blade and the IO expansion card are directly connected by the connectors, so that the transmission distance of the IO signal is shortened, the number of connectors of the blade server is reduced, the cost is saved, and because the penetration of the middle plate is avoided, the influence on the PCB material of the middle plate is lowered, and the accurate connection of the IO expansion ca