Abstract: In order to solve the problem of environmental risks caused by sudden environmental risks，an
environmental risk assessment model is proposed． Certain area in Northeast China is taken as an example． By
collecting data on relevant environmental risk enterprises，using gridded method an environmental risk assessment
model is built． Based on the ArcGIS tool，spatial analysis of regional grids is performed to map regional
environmental risks． Through analysis and screening，it is determined that the high environmental risk areas in
the study area are concentrated in the east near the river and the central region． After detailed investigation of the
industrial structure and ecological layout of environmental risk enterprises in the district，combined with the
preparation of environmental risk maps． Finally，a targeted decision-making plan for urban environmental risk
prevention and control and emergency rescue is proposed．

Key words: suddenly environment accident, risk assessment, gridded method, emergency prevention and control