the comparision of taboo between China and JapanTaboo is a kind of forbidden cultural phenomenon,normally speaking,it is the language which is not allowed to say in special situations or it is the words because of local custom and belief are prohibited to say.A national taboos reflect their folk customs.folk belief .culture,and communicative psychology in this country.Learning a kind of language,we have to make sense of toboos in this country so that we can make correct behaviour in interpersonal communication.Meanwhile,it is a presentation to respect the culture of this country.Owing to my limit on this research,In this paper i oniy select some representive taboos of China and Japan for rresearch .In the comparison of two countries.the writer found there's differences and similarities in the taboo,folk belief ,social cultureand communicative psychology on basis of deep cultural origin betweeen two countries.