A four-corner cut square Chinese character input method based on excellent code comprises the steps of: assigning predesigned code table to corresponding keys of a keyboard; and inputting Chinese Character according to four-corner coding of Chinese character by using the corresponding keys on the keyboard, an inputting rule of Chinese character coding including twenty cutting rules which comprise the characteristic of the excellent code combining with cutting skill. The excellent code table and cutting skill are capable of putting an end to the amphibolous codes, with this input method, most of Chinese characters don't have overlapped codes.