The invention provides a telephone traffic resource sharing method, a telephone traffic resource sharing device and a communication
system. The telephone traffic resource sharing method is realized through a telephone traffic resource sharing device arranged in front of a
computer telephony integration (CTI) module of each telephone traffic center, and the telephone traffic resource sharing comprises the following steps: in response to an incoming call request of a user, reading real-time hardware resource data and real-time seat resource data corresponding to a plurality of telephone traffic centers; determining a first target telephone traffic center for
processing the incoming call request according to the real-time hardware resource data and the real-time seat resource data corresponding to the plurality of telephone traffic centers, wherein the first target telephone traffic center is a current telephone traffic center, an outer area telephone traffic center or a telephone traffic center of other systems in the area; and sending the incoming call request to the first target telephone traffic center for
processing. According to the embodiment of the invention, the load of each telephone traffic center can be balanced, and the
processing efficiency of the incoming call request of the user is improved.