The embodiment of the invention provides a write operation processing method and a device. The write operation processing method comprises the following steps: after receiving the write operation request, inserting the write operation request into a waiting queue according to the receiving time and destination address of the write operation request; after achieving the preset triggering conditions, inserting the write operation request which is received earliest in the waiting queue and the write operation request which is adjacent to the destination address of the write operation request received earliest into the write operation request list, wherein the write request list comprises at least two write operation requests; splitting the write operation request list into sectional lists according to subsections, wherein the sectional list contains at least two write operation request; and processing at least two write operation requests on the sectional lists in parallel. The embodiment of the invention realizes the parallel processing of at least two write operation requests on the same subsection on the RAID layer, reduces unnecessary bottom wall operation, and reduces the IO time delay of the main engine.