Born near Rovigo in 1899, like many others, he had emigrated toward Lombardy. After moving to Sesto, he worked as a crane operator at Falck Concordia.

During the war years, he was a member of the factory's communist cell.

He was arrested during the raids that followed the great strike of March 1944: on the night of March 28—like most Falck employees—he was taken away by men in civilian clothes and imprisoned at San Vittore. On March 31, he was included in the Streikertransport (strikers' transport) compiled in the German wing of the prison. Taken by truck to the Umberto I barracks in Bergamo, he awaited the formation of the convoy that departed for Germany on April 6. This was the fifth convoy carrying organizers and strikers who had halted production in all factories across Northern Italy. The arrests were the Reich's response to the largest general mobilization carried out in Nazi-occupied Europe.

During the journey, Antonio and Aldo Marostica attempted to escape from the wagon without success. Antonio was registered at Mauthausen on April 8 as Schutzhaft, Red Triangle—the classification for those arrested for security reasons and destined for indefinite imprisonment. He was then sent to the terrible subcamp of Gusen, where half of the 68,000 deportees of all nationalities perished. Antonio passed away on December 27; he had managed to endure the hunger, the cold, the backbreaking labor, and the beatings for only eight months. He was only 45 years old. He shared the fate of 96 citizens of Sesto who died in that concentration camp.