Foreign direct investment and Foreign Trade are among the factors that can contribute to sustainable and high economic growth for countries. Foreign direct investment can be a supplement to domestic financial instruments and a tool for achieving the purpose of economic growth. Also, Foreign Direct Investment Due to the numerous advantages, including technology transportation, knowledge of the day, creating different jobs which is a great utility. In fact, the expansion of Trade relations can increase the speed of technology release, which, together with international competition, will increase the productivity of domestic companies and, consequently, economic growth. The main purpose of this study is to investigate the effect of Foreign direct investment and Foreign Trade on Iran's economic growth over the period of 2017-1970 using Auto-Regressive Distributed Lag (ARDL). The results of the model estimation show that Foreign direct investment, Foreign Trade, human capital and gross fixed capital formation (domestic investment) have a positive and significant effect on Iran's economic growth, but government expenditures, income and inflation taxes have had a negative and significant effect on economic growth. It is also that the variable of Foreign direct investment and Foreign Trade has a positive and significant relationship with economic growth in Iran.