Since the world became a small village, the research and studies in any region of the world reached everywhere, and many of the world's economic units turned to internal and external investment. Since we live in the Kingdom of Saudi Arabia and it is one of the world's largest economies and it is ranked 19th globally and first in the Arabic region, recently it has strived to encourage foreign investment and has put in place many facilities, opened up to the outside world, worked on five-year regulatory plans and also an economic vision 2030. Foreign direct investment is about entering economic units into one of the developing countries to revive the economy, reduce unemployment and introduce new technology. But in the case of Saudi Arabia with its current economic strength and projects of billions of U.S. dollars, and also in a period that was the fifth in the donor ranking, the impact of foreign investment on the economy of Saudi Arabia has to be examined and we will address several sectors such as education, industry and agriculture.