The invention relates to the technical field of multi-client concurrent access, and discloses a multi-client concurrent data read-write accelerating method. The method comprises the steps of acquiring data access request information; for any data, if the data access request has one write operation request at most, putting the data into a cache and executing each access operation via the data in the cache; and if the data access request has at least two write operation request, brushing the data in the cache down to a storage device according to a time sequence. The invention further discloses a multi-client concurrent data read-write accelerating device, comprising an access request information acquisition module and an access request execution module. By adding a temporary cache occupation mechanism to multiple clients, the multiple clients can greatly improve the IO speed when concurrently processing a read operation request.