Objectification of pulse diagnosis is a process of combining the quantitative principle in traditional Chinese medicine (TCM) to objectively record pulse information, propose analysis methods, and serve for the disease and syndrome identification, by using advanced instruments and equipment. Since the quality of pulse signal directly affects the method and result of pulse analysis, the important content of objectification research of pulse diagnosis is the collection and processing of pulse information, and the key lies in the selection of pulse sensor. Starting from the research progress of the objectification of pulse diagnosis at home and abroad, and the problems that the objectification standards are not unified and can not be widely used in clinical practice, this paper lists and analyzes several typical pulse sensors such as pressure type, photoelectric volumetric type and optical fiber type sensors, and their application status in pulse monitoring system. This paper emphasizingly introduces the flexible and planar pressure sensors of pulse instrument, and its advantages in the performance of multi-site pulse detection, and prospects the development direction and application fields of pulse sensor, which provides a new idea for the further study of pulse sensor and objectification of traditional Chinese medicine.