In recent years, cross-domain vehicles integrating aerial flight and underwater motion capabilities have witnessed substantial developmental opportunities, driven by expanding demands in both military and civilian domains. However, no sufficiently mature product has achieved widespread adoption to date, partially due to significant challenges during medium transition phases. Research efforts have predominantly prioritized water-entry processes while neglecting the equally critical and complex water-exit phase, which exhibits high-amplitude disturbances, strongly nonlinear dynamics, and unstable mechanical characteristics. This gap underscores the urgent need for a systematic literature review on water-exit research for cross-domain vehicles. In this study, we comprehensively categorize prototypes with Technology Readiness Level (TRL) 4 or higher based on their water-exit strategies. Subsequently, three pivotal technological enablers for successful water-exit are analyzed, alongside an identification of current technological bottlenecks and future development trajectories. The outcomes of this study offer valuable references for cross-domain vehicle design and aim to inspire further experimental investigations into practical engineering implementations.