The invention discloses an elastic data issuing methodin a communication network. The method comprises the following steps that: a front-end access device periodically reports capability data of a service server to a rear-end controller; the rear-end controller stores the capability data and the uploading time uploaded by the front-end access device; according to a certain time interval T and thecapability data uploaded by the front-end access device, the number quantity of black, white and gray lists of the front-end access device is calculated to generate strategy data, the calculated number quantity of black, white and gray lists of the front-end access device and corresponding time are stored, and the generated strategy data is issued to the front-end access device; and the front-endaccess device stores the strategy data issued by the rear-end controller, and detects and matches the call signaling received by the service server according to the strategy data. The invention belongs to the technical field of information, and can adjust the number quantity of distributed black, white and grey lists in real time according to the actual capacity of a service server, thereby elastically starting different detection capacities.