The 22-year-old, who also triumphed in the downhill competition on Saturday, edged out his compatriot Matthias Lanzinger by 0.41 seconds in Sunday's race.
With President Vladimir Putin watching on, local prodigy Alexei Bugayev, 16, was faster than Salcher at the top of the slope, but made a mistake and settled for bronze, adding it to the silver he won in the downhill.
From a field of 31 athletes, 12 failed to finish on a tricky course, although there did not appear to be any serious injuries. Three more were nonstarters.
The race used so-called "calculated time," in which each athlete's time is modified by a percentage reflecting the extent of their disability.
Earlier in the day, Slovakia's Jakub Krako took his fourth career Paralympic gold, winning super G in the visually impaired class.
Over the nine days of competition in Sochi, a total of 72 gold medals will be awarded in five sports.
A Message from The Moscow Times:
Dear readers,
We are facing unprecedented challenges. Russia's Prosecutor General's Office has designated The Moscow Times as an "undesirable" organization, criminalizing our work and putting our staff at risk of prosecution. This follows our earlier unjust labeling as a "foreign agent."
These actions are direct attempts to silence independent journalism in Russia. The authorities claim our work "discredits the decisions of the Russian leadership." We see things differently: we strive to provide accurate, unbiased reporting on Russia.
We, the journalists of The Moscow Times, refuse to be silenced. But to continue our work, we need your help.
Your support, no matter how small, makes a world of difference. If you can, please support us monthly starting from just $2. It's quick to set up, and every contribution makes a significant impact.
By supporting The Moscow Times, you're defending open, independent journalism in the face of repression. Thank you for standing with us.
Remind me later.
