A wideband high gain antenna based on the corner reflector is designed in this paper. The antenna consists of an eightelement printed dipole array, a 1to8 shuntfed network and a corner reflector. The symmetrical feeding network of impedance transformers provides the same amplitude's and phase’s distributions to each printed dipoles in the wideband frequency and improves the impedance bandwidth. The feeding network and the radiation unit are printed on a dielectric substrate with a dielectric constant of 2.65, making the antenna simple in structure, low in cost, and easy to process. Moreover, the printed dipole array and feeding network is placed in the corner reflector, which enables to increase the antenna gain. The measured results show that the proposed antenna can achieve a measured impedance bandwidth for VSWR≤2 of 21.4% (7.00 to 8.68 GHz) and a high gain of about 17 dBi in the corresponding impedance bandwidth.