PCIE storage card capable of flexibly expanding capacity

The invention discloses a PCIE storage card capable of flexibly expanding the capacity. According to the PCIE storage card, on the basis of the InterlM.2PCIESSD interface protocol, a standard PCIEx16 adapter card is adopted, mainboard standard PCIEx16 bandwidth signals are supported, and standard PCIE slots of a server and a desktop computer are compatible; a plurality of NGFF interfaces are arranged on the card to be used as standard M.2 interfaces to be connected with M.2SSD equipment. By the adoption of the PCIE storage card, the storage capacity can be flexibly expanded, and the higher storage transmission speed is achieved; the M.2SSD configured on the adapter card can support the PCIEx4 transmission mode, and the transmission rate can reach 4 GB/s; the capacity of the single PCIE storage card can reach more than 256 G.