Presently in China,there exist many crucial problems as for the status of mother tongue and foreign languages(especially English),their relationship and respective teaching circumstances.How to handle the relationship between mother tongue and foreign languages has become a focus in the field of foreign language teaching and research.From different aspects,this paper discusses mutual influences of mother tongue and foreign languages and the current foreign language teaching situation.It is proposed that the relations among different languages,especially between Chinese and English,should be treated in the vision of ecological linguistics;teachers'cultural qualities and value judgment on language are vital factors in properly handling the relationship between mother tongue and foreign languages.