Lee Peacock had to go off injured after just 14 minutes and was replaced by Christian Roberts up front.
The first half was fairly eventful with the sides going into the half time break with the score still at 0-0.
In the second half Swindon took the lead after 51 minutes with a goal from inside the box by Royce Brownlie.
Peter Brezovan had to make a couple of good saves, but the game looked like it would end with Swindon winning 1-0 until deep into the 4 minutes of injury time ex Swindon striker Tommy Mooney headed Wycombe level from close range.
Then in the final couple of seconds Swindon had a penalty appeal turned down after a hand ball in the box, so the game ended as another 1-1 draw.
Overall it was a good game, and a 1-1 draw was a fair result, just Swindon had come so close to winning it felt like a defeat rather than a draw. Swindon have now taken the lead in every away game so far this season, and are next in action at the County Ground on Saturday at home to Boston.