The grinding rod that this application provided, including be used for installing on the lathe saddle the body part with set up being used for on the body part and grind the grinding part of work piece, grind part detachable rigid coupling on the body part. The body part plays the effect of support, is provided with the abrasive material layer on the grinding part for grind the work piece. Owing to grind part detachable and set up on the body part, like this, when grinding part wearing and tearing back, need not change whole grinding rod, and the grinding part that only needs to be changed, such structure convenience change. This application still provides the lathe including above -mentioned grinding rod, and its technical essential sees aforementionedly.