The invention discloses a stereo-lithography device with detachable groove, which is used for the stereo-lithography of a stereo article and at least comprises a detachable groove and a lifting apparatus. The detachable groove includes a groove body and a bottom plate, and the lifting apparatus is arranged below the detachable groove and used for bearing the detachable groove thereon and controlling the lifting displacement of the bottom plate in the process of the stereo-lithography of the stereo article. The detachable groove is detached from the lifting apparatus upon the stereo-lithography of the stereo article in order to achieve powder removal and article withdrawal.