The invention provides a moving object segmentation method based on phase information. The moving object segmentation method comprises following steps: a step 1 of dividing a picture frame of a moving object into 8*8 image blocks; a step 2 of detecting each image block by means of a phase information method in order to detect whether the image block includes moving boundaries and find out all image blocks including the moving boundaries; a step 3 of connecting centers of the image blocks including the moving boundaries to form an initial profile curve of an active profile model; a step 4 of carrying out iteration and convergence on the initial profile curve and finding out accurate boundaries of the moving object image.