Financial crisis is a phenomenon, which many researchers, writers, and organizations concern with it, therefore, this paper discusses the factors that cause a financial and economic crisis in Sudan. The purpose of this study is to investigate and understand the real factors that cause the economic and financial crisis in Sudan. This paper depends on the literature review and uses a descriptive approach to portray the main real causes of the economic and financial crisis in Sudan. To collect data and information, the investigator uses secondary data sources such as books, references, journals, the internet, newspapers, articles, reports, and other documents that are related to the topic. The findings of this paper represent four points namely; firstly, the initial reason number one that contributed to Sudan's financial crisis is the separation of South Sudan, secondly, the American economic sanctions against Sudan, thirdly the civil war and conflict in the west and new South Sudan. (South Kordofan), in addition to the corruption in its different shapes.