The invention discloses a ticket transmission processing method and a processing system of a billing system. The method comprises the following steps: after receiving a ticket generated through a service program by a service processing node, detecting the load state of a transmission link, if the transmission link is spare, transmitting the received ticket to a billing server, and otherwise, using the received ticket as an overstocked ticket document to be stored to a first storage region in the service processing node; after receiving the ticket transmitted by the service processing node bythe billing server, detecting the load state of a ticket processing module, if the ticket processing module is spare, transmitting the received ticket to the ticket processing module to process, and otherwise, using the received ticket as the overstocked ticket document to be stored into a second storage region in the billing server. The invention can improve the reliability of the ticket transmission and reduce the performance requirements of the communication link and the billing server in the billing system through the two-grade ticket overstocked processing of a service processor and the billing server.