The utility model discloses an intelligent substation interval division device, which comprises an FPGA board card and an RAM board card, and the FPGA board card and the RAM board card are connected through a PCIE bus, so that the efficiency of data acquisition and data transmission can be greatly improved, and the reliability of data transmission can also be improved. The FPGA board card and theRAM board card are connected in a direct insertion mode through the PCIE bus, the size of the whole intelligent substation interval division device can be reduced, the intelligent substation intervaldivision device is more portable, and application and popularization are facilitated.