Abstract: It is important to get information about location and health of underground operation personnel timely and accurately after accident happened in coal mine underground.The paper proposed a design scheme of using wireless body sensor network in underground personnel searching and rescuing system,introduced networking mode of wireless body sensor network in coal mine underground and hardware design of node of body sensor.During happening accident in mine,the network could get physiological information of underground personnel in time and could establish feasible rescuing scheme combing with location function of underground personnel searching and rescuing system,which improved rescuing level remarkably.