Combined with the national natural science foundation projects, international cooperation projects and practical production tasks, he has been engaged in scientific research and teaching in rock mechanics and engineering geology and other related fields. The main scientific research projects undertaken are as follows: under the support of the Youth Fund of the National Natural Science Foundation 1997, he is engaged in the research on the topic of "Volume expansion characteristics and numerical simulation of expansive rock and soil", and has made some creative achievements in the expansion constitutive model and test method; As the main researcher, I have been engaged in the research work of the EU-China cooperation project "Study on the Evaluation and Management Methods of Groundwater Pollution in Coastal Areas", and the results obtained have an important guiding role for Dalian Municipal Government to formulate measures for groundwater resources and environmental protection and management; As a participant, he completed the national "Eighth Five-Year Plan" scientific and technological key project "Study on failure criteria of slope rock mass and landslide mechanism", and the results reached the international advanced level; In addition, in recent years, he has presided over or participated in the completion of more than 30 actual production projects in Liaoning Province, Dalian City and other regions, providing an important reference for engineering construction. The theory and analysis of rock mechanics, experimental technology and constitutive relation of expansive rock and soil, numerical simulation technology of rock mass and groundwater vulnerability evaluation are systematically and deeply studied. He has published more than 50 papers in academic journals such as Journal of Rock Mechanics and Engineering, Journal of Geotechnical Engineering, Journal of University of Science and Technology Beijing, Journal of Northeastern University, and Proceedings of Conferences at Home and Abroad, and won the first prize for academic monograph 1.