NVMe SSD read-only protection method based on FPGA

The invention discloses an NVMe SSD read-only protection method based on an FPGA, and belongs to the field of hard disk data reading and writing. The invention solves a technical problem of data damage during a hard disk operation process. According to the method, a CPU control unit, a PCIE device read-only unit and an interface circuit are integrated on an FPGA; the FPGA is further provided with USB and SATA/eSATA interfaces; the CPU control unit, the PCIE device read-only unit and the interface circuit are connected in series in sequence; an NVNESSD is connected with the FPGA via the interface circuit; and the CPU performs write protection and read operations in the FPGA. According to the NVMe SSD read-only protection method based on the FPGA provided by the invention, the CPU is directly interconnected with the NVME SSD via the interface on the FPGA, and performs complete data protection on the FPGA.