Exploring the mechanism of natural disasters and fighting against natural disasters are the eternal themes for human sur-vival and development. Geo-disasters are one kind of natural hazards, including landslides, debris flows, earthquakes, lique-factions, which can result in serious causalities and economic loss. Therefore, geo-disaster prevention and reduction has been a grand research topic for many decades and a large number of achievements have been made in detection, monitoring, early warning and risk assessment of geo-disasters (Vilímek et al., 2020; Ritchie and Roser, 2019; Xu et al., 2016; Xu, 2015; Huang et al., 2014). However, the climate change caused by global warming and effects of human activities, geo-disasters occur from time to time and the risk remains high, which brings new challenges to scientific and technological experts in this field all over the world (Xu and Xu, 2021; McGlade et al., 2019; Xiong and Huang, 2019; Keller et al., 2015; Huang and Cheng, 2013). In order to track the state-of-the-art research results in geo-disaster prevention and reduction, a few months ago, we started to organize a special issue “geo-disasters” to show the new theories, methods and technical research results in this field. Eventually, we successfully collected 13 research papers, covering the topics of earthquake-triggered landslide and iden-tification, landslide stability analysis, debris flow, liquefactions, paleoearthquakes, and ground motion response.