Firstlythe factors that affecting the ammunition consumption of electro-optical countermeasure are analyzed.Secondlythe tasks undertaken by electro-optical countermeasure ammunition is calculated according to the factorsthe calculation model of electro-optical countermeasure ammunition consumption is established by combining the single task consumption of ammunition.Finallythe calculation method of the model is introduced with a concrete example.The calculation results show that the calculation model of ammunition consumption for electro-optical countermeasures presented is clearly described and easy to calculatewhich can provide a reference for assessing ammunition support in electro-optical countermeasures operationand has a strong practical significance.