作者曾在１９８９年提出关于高速滑坡形成机制的一种解释———“闸门效应说”，此后，又进行了这方面的模型试验，并在滑坡预报研究中监测到焦家村滑坡的变形过程，二者均证明“闸门效应说”是正确的，本文对此做了简要介绍。本文还据实际观察到的现象指出，由于环境条件不同，高速滑坡滑体的运动既可以表现出滑动特征，也可以很快转化成碎屑流表现出流动特征。 In 1989, the author put forward an explanation about the formation mechanism of high-speed landslides --- “the gate effect theory”. After that, it carried out model tests in this respect and monitored the deformation process of the Jiaojia Village landslide in the research of landslide forecasting. Both prove that the “gate effect” is correct, this article made a brief introduction. According to the observed phenomena, the paper also points out that due to the different environmental conditions, the movement of high-speed landslide can show the characteristics of both sliding and translocation into debris flow to show the flow characteristics.