Zig Bee,a low-cost,low power consumption,shortdistance wireless communication technology,is designed for low-rate wireless personal area network(WPAN).It can be used in the low rate sensor network.Zig Bee routing protocol is the core of Zig Bee network layer.Based on the analysis of network configure and the network topology of Zig Bee,the routing protocol of Zig Bee network are analyzed in detail,and the key technique issues of Zig Bee routing are summarized.