State-media published a short film depicting a war between the two countries, showing Saudi forces storming the Iranian capital Tehran.
This extreme threat comes amid renewed tensions between the two states amid growing fears of war in the Middle East.
Saudi Arabia and Iran are locked in a power struggle in the region, each seeking to be the dominate power.
Pro-government newspapers shared the short film as the “operational reality” of Saudi armed forces.
Iran has been accused of aiding rebel groups who have attacked the kingdom, and is expanding its influences throughout the Middle East.