Abstract: The phenomenological turn in self researches maintains that the first priority is phenomenological questions, and that the question about self knowledge is considered as the original of all other philosophy questions concerning self. The common-sense self knowledge has some phenomenological properties, ie, Directness, authority and transparency. Descartes, Hume, and Kant define self with the terms of “unified” “simple” and “continuous”by means of common-sense self knowledge. Common-sense self-knowledge not only shapes the self-concept of ordinary people, but also leads to self-paradox in philosophical research. Reflections on common-sense self knowledge reveal the problem of lexical errors, grammatical errors and methodologies in self-paradox. There will be no solution to self- paradox without the reconstruction of the mind view, by which the self illustrates its complex hierarchy, structure and openness. The first-person path and the third-person path that reach the self are constantly constructing the self itself while giving us self-knowledge. Self-research must inevitably reflect on the whole self-knowledge system including common-sense self-knowledge, and discover, evaluate and utilize the valuable self-knowledge forms, which cannot be separated from the interdisciplinary and cross-cultural research perspective.