The invention discloses an EC20 based multi-node charging complex communication system which comprises a transmission module, a special telephone module, an official communication module, a video monitoring module, a wireless alarm communication module, a user charging information module, a communication module and a broadcast module, wherein the transmission module is used for providing an encryption service, a decryption service and a content verification service for data transmission in one or more of the telephone module, the official communication module, the video monitoring module, a clock module, the wireless alarm communication module, the user charging information module, the wireless communication module and the broadcast module; the special telephone module is used for providing service contact, command routing and conference initiation services between senior executives in a charging complex operator. According to the EC20 based multi-node charging complex communication system disclosed by the invention, by integrating all information and mobile departments, comprehensive management of the charging complex and uniform arrangement are realized, the mobile time is shortened, the intermediate links are reduced, and the loss is lowered.