With rapidly increasing of images that should to be stored and retrieved, it is prospected to introduce the distributed storage in content based image retrieve (CBIR). P2P systems being researched widely for it can offer scalable, wide-area lookup services for distributed resources. But there is a problem that the resourcepsilas unique identifier must be known before posting a request for a given resource. Hence it is difficult to implement the retrieving of similar images. In this paper, we proposed an improved structured P2P routing scheme. In the scheme images are published with their key-value pairs to a unique node or contiguous nodes and similar images can be retrieved based on range queries. The scheme is constructed based on Chord overlays, but it is also suitable be applied to other structured peer-to-peer systems.