Abstract: To accurately identify the dynamic information of the landslide barrier lake disaster process and reconstruct its disaster causing process, two landslide barrier lake disasters in 2018 were studied based on the seismic signals recorded by the around seismograph stations.The Hilbert-Huang transform method was adopted to analyze the frequency characteristics of the recorded seismic signals.Combining with the field investigation data, the process of river blocking and dam breaching were analyzed, and the disaster process was revealed in this study.The results showed that the first Baige landslide occurred at 22:05:41 on October 10th and lasted for a total of 112 s.The second landslide occurred at 17:21:15 on November 3rd and lasted for a total of 102s.The seismic signals induced by the two Baige landslides were mainly low-frequency signals(0.008～0.06 Hz).The low frequency components first appeared and the amplitude gradually increased, followed by strong high-frequency components, which rapidly increased to the peak value and then slowly decreased the noise level.The landslide processes of two landslides could be divided into three stages: the continuous sliding stage of the high landslide(the starting stage),the crushing and disintegration stage, and the scattering and accumulation stage.The process of two dam breachings could be divided into four stages: the initial stage of overtopping, the erosion stage, the accelerated expansion stage and the water and sand rebalancing stage.This study can provide a reference for accurate identification of landslide barrier lake disaster chain and post-disaster rescuing, it can provide a basis for the inversion of dynamic characteristic parameters of landslide barrier lake disaster.