With the acceleration of urbanization, the construction and protection of ecological landscapes are becoming increasingly important. Currently, there are still problems in the field of landscape design, such as a lack of systematization in the design process and a lack of ecological sustainability in the design results. The design of ecological landscape spatial structure is a complex process that involves many factors, such as terrain, climate, niche, species diversity, etc. To solve this problem, an algorithm that can automatically handle these factors is needed. This article proposed a parameterized design system for ecological landscape spatial structure based on IGA (Interactive Genetic Algorithm). This article adopted survey and comparison methods to explore the landscape quality of local urban areas, and proposed several intelligent algorithms to be applied to spatial structure parameter design systems. The performance of these algorithms was compared through experiments. The experimental results showed that the shortest running time of the IGA was 31 min, and the shortest running time of the niche technology improved algorithm was 28 min.