In order to resolve the problem that LED display panel may appear position distortion and cause the high nonuniformity of LED display images, an improved method called distortion correction was proposed on the basis of an existing correction technique namely the correction technique based on CCD.The correction technique based on CCD was introduced,then the reason that this technique needs to be improved was expounded. By taking a LED display panel which is spliced by modules for the example, the distortion correction model was constructed. This model modifies the gray value of every LED display panel’s pixel to reduce the nonuniformity according to the nonlinear relationship between distortion and ideal module position, Furthermore, realization steps were described in accordance with the constructed model. Finally, the improved method was implemented in a LED display panel with a resolution of 128 pixel×128 pixel, pixel center spacing in module of 7.62 mm, and the module containing only one pixel. Experimental results show that this method is able to reduce the nonuniformity of LED display images from 8.9% obtained by the correction technique based on CCD to 0.97%.