The invention discloses a method for writing characters on a touch screen, which relates to a touch screen character writing technology. The method is proposed according to the writing and applicationcharacteristics of a Multi-touch screen and comprises the following steps: transferring a standard character from a character
database,; receiving a character to be compared and input by a user; andcomparing each
stroke to be compared with each standard
stroke so as to obtain a first comparison result and a second comparison result, wherein the standard character consists of standard strokes, the strokes comprise standard
structure property values and standard shape property values, the first comparison result shows whether the
structure property value to be compared of each
stroke to be compared is the same as the standard structure value of the standard stroke or not, and the second comparison result shows whether the shape
property value to be compared of each stroke to be compared isthe same as the standard shape
property value of the standard stroke or not. The invention also discloses a device for achieving the method. The invention is easy to implement and is particularly sui table for penmanship exercises.