Yes, saltwater can help soothe your throat pain. But not if you drink it. Gargling salt water helps kill bacteria in the throat and releases the mucus out of the inflamed tissue, noticeably relieving the discomfort.
Simply add half-teaspoon of salt to a full glass of warm water and stir it well. Gargle with that solution for about half a minute and spit it out. As unpleasant as the taste in your mouth may be, you should do this multiple times a day (at least five).