分析了目前泥石流临界雨量确定常用方法存在的问题 ,以及泥石流临界雨量实验研究中实验降雨量确定的随意性和盲目性 ,提出以兰利 ( Langlie)法为指导进行实验 ,使实验降雨量的确定有了理论依据 ,减少了取得可靠实验结果所需实验次数 ,从而使泥石流临界雨量实验研究更趋完善和可行 This paper analyzes the problems existing in the current methods of determining the critical rainfall of debris flow and the randomness and blindness of experimental rainfall determination in the experimental study of the critical rainfall of debris flow. It is proposed that Langlie method is the guide to experiment, With the theoretical basis, the number of experiments required to obtain reliable experimental results is reduced, so that the experimental research on the critical rainfall of debris flow is more perfect and feasible