They defeated the United States 2-1 in the first semifinal at the Sir John Guise Stadium after 30 minutes extended time.
The Koreans, in red, scored through defender Jon Son Yon and midfielder Ri Hyang-sim.
USA, in white and blue, scored through defender Natalie Jacobs before extra time in the second half.
It was an intense match as both teams put up a good fight in the first half.
The Koreans displayed good ball control and clever techniques.