Design and implementation method of a device for soldiers heart rate（ HR） and respiratory rate（ RR）monitoring based on STM8 are discussed. The device consists of pulse wave sensor

signal preprocessing circuit

microprocessor

power supply module

alarm module. After a lot of experimental verification

this design can carry out long time continuous monitoring HR and RR. The device can realize the early warning function very well

it has good practical value

and is expected to play an important role on future soldier training field.