According to the aero-engine Performance Seeking Control (PSC) of Adaptive Cycle Engine (ACE) in multiple operating modes, an engine performance optimization control strategy based on Particle Swarm Optimization (PSO) is proposed. PSO algorithm has a simple structure and requires fewer parameter settings, and is suitable for ACE with many control variables. This method was applied to the ACE model with two optimization modes: maximum thrust model and minimum specific fuel consumption model. The simulation results showed 11.7% increase in maximum thrust mode and 0.13% reduction in minimum fuel consumption mode for ACE with a core-driven fan respectively.