This article introduces a kind of large-bandwidth acousto-optic deflector using the principle of abnormal acousto-optic interaction. This devise uses GaP crystal as the acousto-optic interacting medium and shear wave as the acoustic wave mode. Considering the tradeoff between the bandwidth and the diffraction efficiency, it uses the structure of single chip transducer. The prepared sample of the large-bandwidth acousto-optic deflector has a 3 dBbandwidth of 1 040 MHz and a peak diffraction efficiency of 20.4%@1 W at the center frequency of 1.62 GHz and light wavelength of 633 nm.