In order to study the effect of particle shape on shear behaviors of interface between coarse-grained soil and geogrid, the gravel and glass beads with the same particle size distribution were selected as test materials, and a series of monotonic direct shear, cyclic shear and post-cyclic direct shear tests were carried out using a dynamic direct shear machine. The monotonic direct shear characteristics of reinforced gravel and reinforced glass beads interface at normal stresses of 30, 60, and 90 kPa were analyzed. Then, the cyclic shear behaviors of two reinforced interfaces under cyclic loading with displacement amplitudes of 1, 3, 6, 9, 12, and 15 mm were discussed, and the similarities and differences of monotonic shear characteristics of two reinforced interfaces before and after cyclic shear were compared and analyzed. In the monotonic shear tests, the shear strength and maximum dilation of gravel-geogrid interface at each normal stress are greater than those of glass beads-geogrid interface. In the cyclic shear tests, the cyclic shear behaviors of gravel-geogrid and glass beads-geogrid interfaces under the effect of cyclic loading with different shear amplitudes are not exactly the same. In the post-cyclic direct shear tests, the interfacial shear strength of gravel-geogrid interface after cycling is greater than that of the interface with no cyclic loading, except for the interface at amplitude of 15 mm, while the corresponding value of glass beads-geogrid interface at all amplitudes is degraded.