The invention provides a data processing method and a data processing system of a 2R1W memory. The method comprises the following steps: according to a depth and a width of the 2R1W memory, selecting 2n+1 SRAM2P blocks of memories having the same depth and width to construct a hardware frame of the 2R1W memory, wherein one of the multiple SRAM2P memories is an auxiliary memory and the rest are main memories; and when data are written in the 2R1W memory and/or are read out from the 2R1W memory, according to a current pointer position of the data, correlating the data in the main memories and the auxiliary memory, and carrying out an exclusive-or operation on the data, thereby completing the write-in and read-out of the data. According to the data processing method and the data processing system of the 2R1W memory disclosed by the invention, with the only need for an additional 1/2n memory area, the 2R1W memory can be constructed based on an existing SRAM unit; and meanwhile, no complex control logic is needed, and the operation on multiple ports can be realized only through the simple exclusive-or operation; and additionally, no additional memory block mapping table and control logic are needed.