The utility model relates to a dynamic advertising device comprising a support, a main display panel, an auxiliary display panel and a transmission mechanism. The transmission mechanism is arranged on the support and comprises a transmission component which is connected with the auxiliary display panel. The auxiliary display panel transmits through the transmission component of the transmission mechanism. The dynamic advertising device is provided with a plurality of display media, corresponding contents are displayed by the plurality of display media is a dynamic-static combination mode, display effect is enhanced, attention of the public to advertisements is improved, and requirements of advertisers are satisfied.