Helmet-Mounted Displays (HMDs) are playing an increasingly important role in modern aerial combats. New binocular digital HMDs have large visual range and high resolution, which are more adaptive to the needs of flight and combat. But the lens of binocular HMD has large off-axis angle, which may lead to serious distortion of images that can change the original image size and shape and influence the display quality and precision. The traditional distortion correction technology of monocular display can't completely meet the needs of real-time distortion correcting. Therefore, this paper introduces a realization method of binocular real-time distortion correction system for the use of binocular digital HMDs. A scheme using pixels cross storage of binocular spatial index coordinates and storage optimization of DDR3 is proposed, and by using the adaptive smoothing filter, the sawtooth problem of the image edges displayed by the distortion correction system is solved. Therefore, a miniaturized real-time distortion correction system with low power consumption is implemented.