Abstract: More and more companies have been paying attention to how to establish efficient relationship tactics. To solve this problem, we firstly brought forward the forming factors of supplier relationship function and relationship quality through literature review. We divided supplier relationship function into two kinds: direct function and indirect function. The relationship quality was valued in three dimensions: trust, commitment and conflict. Then we constructed the model of influence of supplier relationship function on relationship quality. The hypotheses were proved by questionnaires and statistical analysis. As a result, we proposed our suggestion from two aspects: suppliers and customer companies, which will help companies to develop relationship marketing strategies.