The invention discloses a method for achieving a virtual dual port shared memory based on high-speed serial communication, and belongs to the technical field of embedded computing. RAM bus interfaces are provided for two communication CPU parties by FPGA chips respectively, the two FPGA chips are connected through a high-speed communication line, and all layers of communication protocols and an RAM access function are achieved through firmware in an FPGA. By means of the method, interaction between CPUs can be simple and efficiency, such as a double-port RAM, and hardware distribution has high flexibility.