A wearable oxygen saturation detection system was designed,which adopts an oxygen saturation and heart rate integrated chip MAX30102 as sensor and nRF52832 as microprocessor.Photoelectric reflective blood oxygen sensor MAX30102 integrates transmitter,receiver,analog to digital conversion and data filtering,and nRF52832 Cortex-M4F microprocessor integrated hard FPU unit and a variety of wireless communication protocols.These advantages improve anti-interference capability of the detection module,and the running speed and signal processing capability of the system;it can also reduce the designing time and system power consumption,which provide multi-platform for the intelligence system.In signal processing algorithm of the system,a variety of filtering algorithms has been designed,and the Dtrend algorithm has been used to eliminate the baseline drift and motion fake interference,and the design of the wearable oxygen saturation detection system is realized.