Can-xue is a riddle, is the riddle of modern arts and philosophy which is about man's existence and the world itself. On the mileage of Chinese pioneer's literature, its height achieved by the text makes people insurmountable. But for a long time, Can-xue always wanders up and down outside the vision of art criticism, the study on its works also gets deeply stuck in the elucidatory mire for a time not to free itself . Just because of this , it is undoubtedly meaningful to hold accurately and do a kind of comprehensive investigation on the whole study about Can-xue. This text has vertically combed more than 100 theses about the study on Can-xue in the past 20 years, divide it into three stages according to times from the angle lasting, at the same time make a horizontal contrast with the center of study on each stages, review its gain and loss, attempt to seek more broad explanation space on the foundation that forefathers has studied so as to promote deepening development of Can-xue study.