This thesis discusses how Iran attempts to strengthen bilateral relations that have long been established with China. In this study the authors used descriptive qualitative methods and also used literature study literature, magazines, journals, internet, newspapers and other related sources. To analyze this thesis the author uses Multitrack Diplomacy theory. The results of this study, the authors found that Iran's efforts to strengthen the long-standing bilateral relations with China were by increasing bilateral relations through government, improving relations in the business field and also research.