The invention belongs to the technical field of digital image processing and information extracting, and specifically relates to a rapid radar data de-noising method based on a spatial modeling technology. The method comprises the following steps: reading radar data; acquiring the radar brightness coefficient, the backward scattering coefficient and the backward scattering coefficient after normalization through a radar equation; when images are different in number of looks in the same scene, combining the images through multi-look processing; and importing the images to a space model, selecting small local areas of the images, calculating the derivative values of the center pixel value in the 45-degree and -45-degree directions, performing DIST operation on the two images after derivation operation, and synthesizing the two images into a new image. The technical problem that the existing radar data de-noising method cannot achieve a good de-noising effect and a good characteristic information maintaining effect at the same time is solved. Under the premise of maintaining geological radar scattering information to the maximum degree, the image edge or linear feature can be enhanced, and high-quality radar images can be provided for subsequent processing such as fusion and interpretation.