Expansion-card retainer module

An expansion card positioning module is used for positioning a plurality of parallelly-arranged expansion cards and comprises a plurality of positioning members which can be in mutual overlapped connection. Each positioning member comprises a clamping portion clamping the corresponding expansion card, an inserting connection portion arranged on one side of the clamping portion, and a clamping connection portion arranged on the other side of the clamping portion, and the inserting connection portions of each two adjacent positioning members are connected to the clamping connection portion of the other positioning member. The expansion cards which are parallelly arranged are in clamped connection through the positioning members which are in mutual overlapped connection, so that the expansion cards are fixed to be a whole, and interference caused by deformation of the expansion cards is prevented.