Compound soil erosion caused by various external forces is the main erosion characteristic of sloping farmland in Chinese Mollisol region. However, there are few reports on the quantitative study of interaction between freeze-thaw, wind and water-hydraulic on compound soil erosion. Thus, indoor freeze-thaw simulation, wind tunnel test and indoor simulated rainfall experiments were conducted to analyze previous freeze-thaw, wind and water agents impacts on hillslope soil erosion in Chinese Mollisol region. A series of experiments were designed, including test without previous freeze-thaw action and only wind erosion(Ⅰ), previous freeze-thaw action first and late on wind erosion test(Ⅱ), only water erosion (without previous freeze-thaw action and without wind erosion test)(Ⅲ), previous freeze-thaw test first, then followed by wind erosion test, and late on water erosion test(Ⅳ), so as to distinguish the contribution of previous freeze-thaw action to wind erosion, and the contribution of previous freeze-thaw and wind superposition action to slope water erosion. The results showed that the previous freeze-thaw action significantly increased the wind erosion amount on the slope (P<0.01). At the wind speed of 9 m/s and 15 m/s, the previous freeze-thaw action increased the amount of wind erosion by 1.02 and 1.44 times, respectively. It also significantly increased the total amount of wind erosion sediment transport at different heights from the soil surface (P<0.01). Under the two wind speeds, the previous freeze-thaw action increased the wind erosion sediment transport rate by 1.71 and 1.04 times, respectively. And the contribution rate of previous freeze-thaw action to wind erosion was 100.0% and 140.0% respectively at the two test wind speeds. The previous freeze-thaw and wind superposition action obviously increased the amount of water erosion on the slope. Compared with the treatment without previous freeze-thaw and wind superposition action, the amount of water erosion on the slope of previous freeze-thaw and wind superposition action increased by 11.9% and 20.6% respectively under 3° and 7° degree. Under the two gradients, the contribution rate of previous freeze-thaw and wind superposition action to slope water erosion was 11.9% and 20.6% respectively. Previous freeze-thaw action weakened the soil erosion resistance, after previous freeze-thaw action, the soil bulk density decreased 3.42%, less than 0.25 mm of dry aggregate increased by 14.1%, greater than 1.0 mm of dry aggregate decreased by 15.1%; Meanwhile, the early stage of the wind erosion produced a dent in the earth's surface and stripe micro topography, further increase the slope rainfall erosion and runoff erosion ability, as a result,the previous freeze-thaw action and wind erosion increased the severity of sloping soil erosion.