Based on the FPGA hardware resources, a FPGA in the logic circuit design is presented to achieve the two-point correction. The floating-point adder, floating-point divider, floating-point multiplier and the internal RAM, ROM memory in FPGA can be used to calculate the correction factors in real time, and then the non-uniformity correction is completed on the linear array infrared detector, thus the correction accuracy is ensured. At the same time, the coefficient and the reading of image data can be completed in a clock cycle by using the parallel processing ability of the FPGA.