Traditional K-means arithmetic model is half-baked because of the segmentation of the images is only concerned about feature vectors but ignore the spatial relation between two of the pixels.This paper use Markov random field to describe the neighborhood system of the image pixels.Then the concept of "refusal" is introduced in the K-means arithmetic.Meanwhile

the method of initial cluster number and center is also decided.Therefore the more integrity model of image segment arithmetic based on Markov random field is formed.The arithmetic is validated by experiment later.