The invention provides a layering-guided video image target segmenting method, which comprises the following steps: preprocessing an image frame; acquiring an initial segmenting mark; acquiring the segmenting mark after mending lack segmentation; acquiring the segmenting mark after mending the prior segmenting mark; and fusing the segmenting mark after mending lack segmentation with the segmenting mark after mending the prior segmenting mark, thereby acquiring the final segmenting mark. By using the method provided by the invention, the problem of the prior art that the target cannot be completely extracted when the target is similar to the background under a target and background interactive video monitoring environment is solved.