Caregiver involvement is an essential part of delirium screening and management, which helps to identify delirium early and develop targeted interventions to prevent or reduce delirium and improve prognosis.The article focuses on the delirium assessment tools that caregivers participate in, divides them into single item and multi-item delirium assessment tools, and summarizes, analyzes, and compares the content, characteristics, measurement performance, and application of the two types of tools.The paper aims to provide a reference for the improvement, localization, and clinical application of caregivers′ participation in patient delirium assessment tools.