本文讨论了按鼓励性对策法则进行的二人、二级决策问题。利用可诱导区的概念对这一问题解的结构给予了完整的描述并总结出将其化为单人决策问题的等价原理。这一原理可以推广到一般情况,并可用于简化一类多人、多级决策问题。一些特殊情形也可以利用这一途径求解。文中给出了数值例子。 This article discusses the two-person and two-level decision-making under the encouragement law. The concept of inducible region is used to give a complete description of the structure of the solution to the problem and to conclude the equivalence principle that turns it into a one-person decision problem. This principle can be generalized to the general situation and can be used to simplify a multi-person, multi-level decision-making problem. Some special cases can also be solved in this way. Numerical examples are given in the paper.