A method and a device for classifying wireless data service are provided in the disclosure. The method comprises the following steps of: calculating Key Performance Indicators KPIs of the wireless call information, matching the calculated KPIs with the service model which is preset, and determining a service type of a call. The disclosure may quickly and accurately differentiate the actual IP service type of a user without increasing the system load at a base station or a core network, so that the quality of service of a wireless network is improved and the resource may be distributed reasonably.