Abstract: The life cycle of WSN directly affects the application value in the Internet of things. According to the problem of how to prolong the life cycle of WSN, further study had been made on this issue. And ultimately the life cycle of WSN was effectively prolonged. Through the formation of simple and stable routing to provide the basis for robust communication path for the MAC layer, periodic sleep and wake-on-radio mechanism and FHPR algorithm were designed from the aspects of lowering power consumption and reducing the probability of packet collisions. The periodic sleep and wake-on-radio mechanism could allow the nodes in the ultra low-power state in a long term. The FHPR algorithm included frequency hopping table and the mechanism of packet regroupment, and the former could decrease the probability of data conflicts and the later could not only decrease the probability of data conflicts but also decrease the power consumption. Experimental results showed that the WSN constructed by the hardware platform can run stably and the life cycle has been prolonged obviously.