目的 为解决人们日常佩戴口罩中的防护有效性问题，阐述医用口罩过滤机理和过滤效率，综述智能指示标签在智能口罩方面研究现状和应用进展。方法 从医用口罩的防护性能出发，分析医用口罩中智能指示标签的应用现状，分别对气体、湿度和病毒进行了智能指示标签方面的研究综述。依据酸碱指示剂颜色变化、湿敏效应、抗原–抗体特异性结合等，以实时监测湿度、CO2含量及病毒成分，从而判定医用口罩的防护性能。结论 阐明了智能标签在医用口罩防护有效性指示方面的研究进展和工作机理，为智能标签在医疗防护方面的创新应用提供了思路。

The work aims to elaborate the filtration mechanism and efficiency of medical masks, and review the current research status and application progress of intelligent indication labels in medical masks, so as to improve the protection efficiency of masks in daily use. Firstly, from the protective performance of medical masks, the application status on intelligent indication labels in medical masks was analyzed. Then, based on acid-base indicator color change, moisture-sensitive effect, antigen-antibody specific binding, a research in intelligent indication labels on them was conducted for gas, humidity and virus respectively to monitor real-time humidity, CO2 content and virus composition. Thus the protective performance of medical masks was determined. The research progress and working mechanism of intelligent labels in indication of protection effectiveness are clarified, providing ideas for innovative application of intelligent labels in medical protection.