In this paper, we presented a novel low-profile differentially feeding dual-polarized antenna adopting wideband artificial magnetic conductor (AMC) reflector for the fifth generation (5G) base-station communications. There are some winding inductors arranged at both ends of the cross slots, which result in a small-size radiating patch as well as a wide bandwidth. Both impedance bandwidths of 47.3% (3.28-5.31 GHz) and 47.2% (3.29-5.32 GHz) can be achieved for Ports I and II, respectively. Due to differentially feeding scheme, a high port isolation of below -40 dB during the working frequency band is obtained. In addition, thanks to the AMC structure, the profile of proposed antenna can be reduced from 18 to 9.5 mm (0.13λ_c, λ_c is the free-space wavelength at the center frequency).