This study focused on wind-water erosion that wind direction and runoff direction were opposite (i.e., windward slope) for understanding the interactions between wind and water erosion in the wind-water erosion processes using artificial simulated rainfall and wind tunnel experiments. Results showed that:(1) The prophase wind erosion resulted in the advanced runoff and increased intensity in water erosion compared with the single water erosion without wind erosion. (2) Water erosion rates were increased by the prophase wind erosion, yet rather than its changing tendency. Water erosion rates increased gradually and then tended to be stable over time during rainfall experiments regardless of whether the prophase wind erosion occurred or not. Particularly at relatively large wind velocities (12 and 15 m/s), an increase occurred in the water erosion rates, which could reach up to 4.6 times of the water erosion only. (3) The proportion of water erosion in wind-water erosion was always larger than that of water erosion in the sum of water erosion only and wind erosion only. This indicated that the prophase wind erosion obviously intensified water erosion. However, the contribution of water erosion to wind-water erosion decreased significantly (from 93% to 0.5%) with the increase of wind speed. Future research should consider the impacts of multiple occurrence of wind and water, and typical windward-leeward slope topography on crisscross erosion, to further explore the complicated interactions between wind and water erosions.