FBG is the most potential material for intelligent clothing because it has the characteristics such as anti-electromagnetic interference,small size,long life and good flexibility.According to the characteristics of the human heartrate signal,the metal vibration cavity was designed.ANSYS was used to analysis the vibration of the cavity and determined the the FBG package method.Then in the laboratory the system achieved heart rate signal acquisition,completed the data analysis and signal extraction algorithms.The experimental results show that:the sensor completed signal acquisition and analysis in real-time online and the measurement error is less than 1 times/ min.