The main objective of this study is to analyze the subject of oil and its impact on the economies of Arab countries and Algeria model. Focus on the theoretical aspect of the phenomenon and scientifically explainable. The results showed that there was a negative impact of oil revenues on Arab economies through the emergence of inflationary gaps and chronic deficit in the balance of trade and see it to rely on this income excessive public spending, both current and investment. Given that the public budget reflects that the financial plan that includes revenue and public expenditure for future financial period is usually a year. The growing role of the oil sector in the economies of the Arab states has made it rely largely on the revenue of this sector in engineering budgets and programming public spending. Therefore, the consequences for the future neglect in addition to outside the hydrocarbons sector (agriculture and industry in particular), given the rates of contribution to theGDP of these countries.