The images generated by large field-of-view (FOV) optical equipment usually have geometric distortion.It is difficult to make geometric distortion correction in real time for images with high resolution and serious distortion.Based on the model of project system with pre-distortion and the distortion features of large FOV optical system,we proposed a pre-distortion method with the position of the pre-distorted image being adjustable.The corresponding hardware architecture is also proposed for realizing bicubic interpolation calculation.The experiment results show that the proposed method is easy for engineering application and is accurate in distortion correction.