The investment government expenditure is considered the fundamental of enhancing the economic activity as it has become a mean for achieving capital accumulation in all economic  sectors, The Iraqi economy is characterized of being yield unilateral depending petroleum  revenues as an essential  resource of financing government expenditure , as  the contribution of petroleum  sector in GDP is large in proportions to other economic sectors  contribution.

 The relationship between investing government expenditure, and non-oil GDP  is about to be not existent during the period of the research on the long term, and the reason is the  economic sanctions imposed which left negative effects  on Iraq economic representing in the decrease of employment levels in the Iraqi sectors , the decrease of productive capacities in commodity sectors ( agricultural - industrial ) and other reasons ,  After  U.S. invasion of Iraq in 2003,new economic features have emerged representing in infrastructure collapse for the  most economic and, the decrease of the investments presented to be  sustained and expanded for the purpose of their fittnss with population increases and economic and social developments ,

the continuity yield style  of  and non- productive of the economic policy trends  which contributed in deterioration of  commodity sectors , particularly agricultural and industrial , and the accumulation of yield  service of  Iraqi economy for the benefit of defense and security activities that brought a continuous  increase in consumption expenditure at the expense of investing expenditure  in productive and development fields ,in addition to that  the prevalence of financial and administrative corruption in all economic, managerial and security government activities , and the lack of suitable investing environment that is of a direct role in the decrease of production and hence, the  weakness of its contribution  in non-oil GDP