Collapsing hills are widely distributed in Southern China.In recent years

the survey of collapsing hills has pr ovided anumber of data for scient ificstudies.Based on statistical data

this study recognized the problem of elevation and slope orient at ion choices of collapsing hills in South China

and considered it might be doubtful.The explanations for the chioce phenomena have been renewed.Typical collapsing hill erosion studies in Southern China show that

human activities have been the main inf luencing fact or on collapsing hill dist ribution

and the relief of collapsing hill erosion is more significant than the elevation.Therefore

the previous explanations of the choices might be not always correct.The argument that more sun radiation results in more collapsing hills on south slope than on north slope

may be right but only under the condition of no vegetation cover slopes.Statistical errors might be the reason why most collapsing hills prefer south slope to north slope.Finally

the study concludes that the influence of human activities on collapsing hills should be paid more at tention.