The optimal allocation of offensive mine-laying operation(OMLO)is the key to improve the benefit-cost of mine obstruction. Based on the analysis of fundamental problems of OMLO and blockade characteristics,the naturalization method is adopted for elements such as sailing place,mine platform,mines and enemy port targets involved in the OMLO plan. Then,the optimal allocation model of OMLO on maximizing resource investment and maximizing the utilization of existing resources has been built respectively. This paper also discusses the data screening problem of the model which has been verified by typical case.