A kind of two species ecological model was considered inthis paper.Using the me-thod of homotopy analysis, the approximation of thesolution for the model was obtained.

• 摘要 利用同伦分析方法，研究了一类二物种生态模型，得到了该模型解的近似展开式.；为检验该方法的有效性，分别在无竞争和有竞争系统中，将二阶近似解分别与解析解和数值解作了比较