Aiming at the shortage of Zigbee network stratification, the annular stratification is introduced. The improved flood routing which is combined with the mechanism of updating stratification and the mechanism of frame transmit is adopted to achieve the target. The wastes of resources and data implosion are avoided by using the improved flood routing. And the process of establishing annular stratification structure is also optimized. The simulation result shows that the improved flood routing is suitable for uniform network and non-uniform network. At last, the improved flood routing is carried out on the CC2430, and the real results match the expected results.