Cyclic simple shear tests are conducted on RSM with 4 rubber contents (0%, 20%, 30% and 100%) under 4 different vertical consolidation pressures, and the effects of geo-cell reinforcement on the dynamic shear modulus of RSM are analyzed. The results show that: The dynamic shear modulus of reinforced and non-reinforced RSM both decrease with the increment of dynamic shear strain amplitude and rubber contents and increase with vertical consolidation pressure increasing. The curves of the dynamic shear modulus intend flatten and the nonlinear characteristics are weakened with the consolidation pressure increasing. The dynamic shear modulus of RSM improves with the geo-cell reinforcement, but as the shear strain amplitude and consolidation pressure increasing the effect of reinforcement decreases. The geo-cell reinforcement delays the attenuation of modulus ratio of RSM and the effect decreases with the consolidation pressure increment.