At present,neither the state nor the industry has formulated relevant design specifications or technical measures for fire protection and smoke exhaust in the event of a fire in the electric vehicle garages,so there are many disputes over the design of fire protection and smoke exhaust systems in the electric vehicle garages.By summarizing a large number of national and local standards,on the basis of previous studies,combined with domestic and foreign experimental data,and selecting a typical model to calculate,this paper puts forward a reference design method for fire protection and smoke exhaust of the underground electric vehicle garages,to accumulate experience for fire safety design of the underground electric vehicle garages.