Great progress has been made in volcanology. This paper summarizes the achievements in various aspects of volcanology in global research in recent years, including new understanding of the basic concept of volcanoes, volcanic constructions, various classifications on volcanoes, volcanic petrology and geochemistry, volcanic petrography, volcanic eruption index for evaluating the size of volcanic eruption, classification of rocks and geochemistry, discrimination diagrams of various major and trace elements, the relationship between the distribution of active volcanoes and plate tectonic theory. The disasters and benefits brought by active volcanoes to mankind, the monitoring of active volcanoes, the past volcanic activities on biological destruction, the research of monogenic volcanoes, etc. Volcanic ~ tectonics is a direction of volcanology research in the future. Through the study of the relationship between volcanoes and tectonics, we can reveal the distribution of volcanoes and the evolution of the earth. The magma ejected by volcano is the result of propagation to the surface in the form of dike or pipe. The location of Changbai Mountain on the border between China and North Korea is a special case, which should be worthy of indepth study. There are many Cenozoic volcanoes distributed in China. Whether they are monogenic volcanoes, these volcanoes have evolution regulation in compositions, and the relationship between their distribution and geotectonic need to be deeply and systematically studied.