Investment is a key component of growth, and a key supporter of the development plans, In recent years, the evolution of the developmental role of the General Organization for Social Insurance significantly, through development of the nature of their work, and orientation to take advantage of all opportunities to achieve what is in the interest of all beneficiaries on the one hand, and support the development of other plans. This research aims to study the impact of investment surpluses in General Organization for Social Insurance on economic development by analyzing the role of investment and its effect in all investments in Syria, then we study the impact of investments revenues on GDP . The main finding of the research was the significantly role of investment the surpluses in increasing the average of investments in Syria, and the significantly and strongly relationship between the investment of the surpluses in General Organization for Social Insurance and all investments in Syria, and there is significantly and strongly relationship between the revenue of that investment and GDP, which means the positive effect of that investments on economic development in Syria.