The work aims to analyze the preparation and performance characteristics of nano-silver conductive materials, and summarize their application and research progress in flexible sensors, so as to provide reference for relevant researchers. The preparation and characteristics of nano-silver conductive materials with different morphologies were compared by referring to the relevant references of nano-silver materials and flexible sensors in China and abroad in recent years. The research on nano-silver conductive materials in flexible sensors was analyzed, and their applications in intelligent packaging, medical health and environmental monitoring were summarized. The surface plasmon resonance characteristics of silver nanoparticles made them widely used in biosensor research. The excellent flexibility brought by the high aspect ratio of silver nano-wire made it widely used in the sensor with high flexibility requirement such as strain sensor. However, the flexibility and stability of nano-silver sheets were relatively poor, and the research and application in flexible sensors were relatively few. Nano-silver conductive materials with different characteristics were used in the preparation of sensors, and had good results in intelligent packaging, medical health and environmental monitoring. The excellent performance of nano-silver conductive materials make them widely used in the flexible sensors. In the future, in addition to optimizing the preparation of nano-silver conductive materials and the structure of sensors, the exploration on the interdisciplinary development of nano-silver conductive materials and the combination of nano-silver conductive materials with sensors, artificial intelligence, etc., will become an important research direction in medical health, intelligent packaging and other fields.