The paper is a about the special writing mechanism,unique writing manner, exceptive writing pattern, and specificexamining method and standard for self-simulating handwriting.In the first part, differences of the concepts of simulating hand-writing and self-simulating handwriting, their writing manners,mechanism and resultant patterns are investigated. In the secondand third parts, illustrated by cases, four characteristics of self-simulating handwriting and the corresponding rules are induced,and the highlights for recognizing the specific writing aresummarized. In the last part, the examining method and stan-dard for self-simulating handwriting are discussed.