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This article expounds the approach of how to develop a PCI resistive load card based on PCI interface chips and FPGA technology, mainly focusing on the implementation of control logic on FPGA, key points of using PCI interface chips to develop PCI cards and the procedures to develop driver. Actual application of this card which offers guaranteed low resistor tolerance errors of ±1% with a temperature coefficient of 35 ppm/℃ in several avionics testing equipment indicates that the card’s responsivity and veracity can meet the requirements in aviation maintenance field.