In order to research the impact of lessive soil erosion under the freeze-thaw condition in spring thaw period,freeze-thaw temperature,freeze-thaw cycles,initial water content,snowmelt water flow,thaw depth were selected to study the effects of these five factors on soil erosion by using indoor artificial simulated snowmelt experiment.The results showed that the primary factor was snowmelt water flow.The erosion was mainly happened in the first 15 freeze-thaw cycles in spring thaw period,even though the cycles increase after that,the erosion wasn′t increase at all.There was not a significant linear relationship between soil moisture and erosion,but the erosion of relatively small initial soil moisture was greater than the larger amount of initial soil moisture.During the process of scouring runoff,the size of snowmelt water and the existence of soil frozen layer,which both affect the relations between the thaw depth and erosion.When the snowmelt water flow was smaller,the less depth of soil was thawed,the more amount of soil will be eroded,that appear a negative correlation between the two;however,when the snowmelt water flow was greater,that appeared a positive correlation.