Pulis has been impressed with the passionate support that Palace have received from the stands since he has taken charge of the south London club.
He admits the fans have played a key role in the team's battle against relegation and urged them to continue their vocal backing in the closing games of the campaign.
"The supporters are absolutely wonderful, but they've been wonderful ever since I've walked through the door. They haven't taken their foot off the pedal and as I've said, with the games we've got left, they need to be like that," said Pulis.
"The Premier League is the most competitive league in the world, without a question of a doubt and that is helped by the passionate supporters that follow their clubs."
Pulis has worked in a number of leagues during a long managerial career that includes spells at Stoke, Gillingham and Plymouth.
He hailed English fans as the best in the world due to their unwavering support of the team, regardless of the team's fortunes.
"In this country it's tribal," said Pulis. "Wherever you go, whether you are working in the third division or the Premier League, people will idolise their football clubs and will follow their football clubs, yet in greater numbers maybe at the top, within the Premier League.
"But even at the bottom, the tribal instincts of supporters to stick with the team, the hometown team, is absolutely fantastic and that's what makes this country for me the greatest football nation in the world."
Palace's co-chairman Steve Parish feels the fans have turned Selhurst Park into a daunting venue for opposing teams.
"It's been a real 12th man for us and I think it's an intimidating atmosphere for teams, they aren't used to the crowd being so close to the pitch these days," he said.
"(Chairman) Bill Kenwright said that when Everton came over the whole crowd sing. It's been a long time since he's been to a football ground where the whole ground at times encourage the team. They have been a fantastic help."