Abstract: Influence relationship between microwave power transmission and sensor node communication was researched in intermittent co-channel mechanism. A frame loss rate model was established, and the relationship among frame loss rate, power transmission time, power suspension time and data transmission rate was analyzed. The simulation results show that the frame loss rate raises along with the ratio of power transmission time and power suspension time; when the data transmission rate is below 100 kbit/s, the frame loss rate declines with decreasing of the data transmission rate. The real measurement result proves the validity of the frame loss rate model.