The shear performance of geopolymer concrete was studied by direct shear test. Sixteen test cases were set up， including three cases with ordinary concrete strength for benchmarking. The test results show that the shear strength of geopolymer concrete increases significantly with the increase of concrete strength and shear reinforcement ratio， and decreases with the increase of the shear plane height. The shear plane width has insignificant influence on the shear strength. The modes of shear crack growth and shear failure of the geopolymer concrete are consistent with those of the ordinary concrete while its ultimate shear strength is slightly higher than that of the ordinary concrete. The mean ratio of the experimental shear strength to the theoretical value by Loov and Patnaik is 1.21， with the Loov and Patnaik value being the closest to the experimental value compared with other theoretical values.