为改进生物地理学优化(BBO)算法在工程结构优化设计中的性能，引入非线性物种迁移模型和“精英引导”等思想对BBO算法进行改进，并将算法应用于结构工程优化领域。以２ 个连续变量的经典桁架结构为例，进行结构在满足各项约束条件下质量最小的优化设计。数值算例表明，改进算法应用于工程结构优化设计时具有收敛速度快、稳定性好的特点，性能比BBO算法有较大提升，可以有效地应用于工程结构优化设计。-To improve biogeography optimization (BBO) algorithm in engineering optimization design performance, the introduction of non-linear species transport model and　elite Boot　and thought of BBO algorithm is improved, and the optimization algorithm is applied to the field of structural engineering. Classic truss structure two continuous variables, for example, structural optimization design quality at minimum meet the constraints. Numerical examples show that the improved algorithm is used in engineering structural optimization with the convergence speed design, good stability, performance has greatly improved over BBO algorithm, it can be effectively applied to engineering design optimization.