The invention discloses bidirectional filtration-based real-time image de-hazing and enhancing technology, which is particularly applicable to the de-hazing and enhancement of images and videos under severe weather conditions and belongs to the field of digital image processing. The technology specifically comprises the following steps of: estimating an atmospheric light vector value A of an input hazy image; educing an atmospheric light curtain graphic V; calculating the irradiance R of the de-hazed image according to the calculated atmospheric light vector and the atmospheric light curtain graphic; and finally enhancing the calculated irradiance. The technology can accurately estimate the atmospheric light vector by a dark element-based method and estimate the atmospheric light curtain based on a bidirectional filtering method, reduces the calculation complexity and can ensure the image de-hazing effect; meanwhile, by improving the bidirectional filtering method, the technology increases the image processing speed qualitatively.