Abstract: Intensification of environmental safety has been discussed from the angle of the concept,significance,necessity,urgency,requirements,contents,and major practices of environmental safety.It is held that to improve the awareness of environmental protection of the nation,intensify the sense of public environmental safety,develop new circular-economy-based types of industries,build up economic operation models capable of guarantee environmental safety,enhance the environment and development integrated decision-making mechanism,set up an environmental safety monitoring and management system,consummate the environmental policy and law systems,expedite the processes of legislation for environmental protection,introduce market competition mechanisms,establish a multi-environmental protection input system,and reinforce research on environmental science and technology are major approaches to intensifying environmental safety and guaranteeing sustainable development.