Engineers in the central European state have finalised plans for the vast barrier, which would stretch along its entire southern border with Hungary.
Austria has repeatedly clashed with Brussels over its clampdown on illegal migration and has already put a daily cap on the number of people who can claim asylum.
And earlier this year the country’s parliament voted through a motion allowing it to declare a state of emergency if migrant numbers suddenly rise, meaning it could instantly shut its borders.
The new border fence will mark a considerable escalation in Austria’s physical attempts to bring down migration, with the country only having constructed one small 4km fence along its border with Slovenia to date.
State officials have reached agreements with hundreds of landowners along the 100km stretch of border which will allow the fence to be put up in record time should the number of refugees increase again, according to a police spokesman.