The fire-power allocation problem toward the plane-point targets system consisting of some groups of dagmage-dependent targets is discussed in this paper.“The principle of Marginal Damage Decreasing” and the conclusions such as“the properly sequential optimization plan，that is，global optimization plan” has been reached with the same weapons used. On the basis of above-mentioned points，the algorithm to solve problem is presented.“Properly Sequential Optimization Enumeration” has been developed with the different weapons used and conclusions concerned have been reached.