Both English and Chinese are rich in "dog" cultures. In order to learn English well and communicate successfully with foreigners in cross-cultural communication, it is necessary to make a comparative study on "dog" cultures in both languages. This thesis makes a com parative study on two language-speaking people’s attitudes and feelings toward dog, histories, customs and stories about dog in both Eng lish and Chinese cultures .Through the comparative study, the thesis reveals the differences and similarities of "dog" cultures in both lan guages.