Pardew believes defender Adrian Mariappa was fouled by Graziano Pelle just before the Italian headed home the Saints' second goal while a penalty won by Sadio Mane, under pressure rom Pape Souare and Mariappa, should have been a free-kick outside the box instead.
After the match, Pardew rued Michael Oliver's judgements as the Eagles ended the Premier League season with a disappointing result ahead of the FA Cup final against Manchester United at Wembley next weekend.
"I was a bit disappointed with the referee's decisions," Pardew said.
"The Pelle goal was a definite push (on Mariappa), and he actually looks round at the ref as if to say 'Did you see it?' And he should have seen it, but he didn't.
"The penalty decision again, which is outside the box, and the linesman overruled him. His gut feeling is it was outside, he stood on the edge of the box for a little while, and the linesman gave that, and he got it wrong.
"The game was really balanced at 2-1, it was really open, a really good game. I'm not making any suggestion we deserved to win, but it certainly could have been tighter and closer, and we could have eked a draw out if we had taken our chances."
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