In the world, the relations of various cultures and civilizations are becoming fundamental in the human society of the era of globalization. The different relations within Canada are actually a microfilm of the worldwide cultural relations. The research on Canadian multicultural policy and reality can help us deeply understand the relations of various cultures in the world. Thus it is of global significance. This text, revolved around the multicultural issues, from Canadian and global angles, tries to give a brief description and exploration of such confusing phenomena and conceptions as the cultural unit, cultural conflict, cultural biological chain, cultural magic, cultural fog, cultural barriers, cultural trenches, Cultural Cold War, cultural background and cultural accumulation.