Based on the collected series of experimental data and many well-known rotational hardening expressions, a rotational hardening expression for different stress paths is proposed, mainly including 2 parameters which can be determined in a direct way through analysis. The proposed rotational hardening expression has been implemented to the MCC model and adopted to represent the stress-strain behavior of clays under different loading paths. The simulations are compared with the experimental results. The comparisons show that the simulated results with this proposed method have good agreement with the experimental results, verifying the rationality of the proposed rotational hardening expression.