The invention discloses a packet microwave based multi-point service distribution system, and belongs to the technical field of digital microwaves. The system can realize point-to-multipoint distribution and return in packet service. In the system, a root node is connected with upper equipment, a terminal node is connected with different types of packet service terminals, a relay node can be arranged to establish a relay route between the root node and the terminal node. Data transmission among the nodes is carried out via microwave channels, downlink is directly broadcast, and uplink uses multicarrier modulation technology to avoid co-frequency interference. The system can be widely applied to point-to-multipoint scenes including mobile base station return, enterprise private network access and city security guard system; compared with traditional point-to-point microwaves, the system is not limited by horizon transmission, and performance decrease caused by co-frequency interference can be avoided; and compared with a multipoint-to-point microwave scheme, the total equipment cost and the installation and maintenance cost are reduced greatly.