This volume constitutes the refereed post-conference proceedings of the 17th International Conference on Advances in Swarm Intelligence, ICSI 2026, held in Chengdu, China, during July 17-20, 2026.

The 44 full paper included in this book were carefully reviewed and selected from 93 submissions. They were organized in topical sections as follows: Swarm Intelligence Optimization Methods; Particle Swarm Optimization; Multi-Objective Optimization; Optimization Methods for Applications; Machine Learning; AI Agent, Multi-Agent System and Embodied AI; LLM-based Heuristics Approaches; Scheduling and Task Allocation; and Various Optimization Applications.