在临床诊断过程中，血压能够反映患者血液流动、身体体征变化等生理信息，是诊断组织器官健康状态的重要参考数据。由于传统血压测量方法存在有创、间断等局限性，利用光电容积脉搏波描记法（photo plethysmo graphy, PPG）实现血压的无创连续检测成为当前血压测量的热门研究领域。为此，首先简要介绍了PPG的理论背景与技术原理；其次阐述了利用PPG进行血压预测的具体流程，包括公开数据集、评估标准、预处理方法、特征提取与模型建立，并就不同方法的优缺点进行了对比分析；最后，总结了基于PPG实现无创血压连续测量的挑战与未来研究方向，为今后的研究提供参考。

In the clinical diagnostic process, blood pressure is a crucial parameter that serves as a key reference for assessing blood flow dynamics and health status. Basing photo plethysmo graphy (PPG) for non-invasive continuous blood pressure monitoring has been a surge of interest in the research field, due to the limitations of traditional blood pressure measurements, such as invasiveness and intermittency. Firstly, theoretical background and technical principles of PPG were briefly introduced. Secondly, the specific processes including open datasets, evaluation standards, prepossessing methods, feature extraction, and model establishment, were comprehensively discussed, compared analysis of the advantages and disadvantages of different methods was also conducted. Finally, the challenges and future research directions in achieving non-invasive continuous blood pressure measurement based on PPG were summarized, with the aim of providing guidance for future research endeavors.