Buttler played as the Three Lions lost to India by just five runs in a reduced overs match in the final at Edgbaston in 2013.
This year, the ‘mini World Cup’ will once again take place on home soil, with the England facing Bangladesh, New Zealand and Australia in the group stage when the ODI tournament starts in June.
“It’s a huge summer for English cricket, it’s great to have the Champions Trophy on home soil,” Buttler told ecb.co.uk.
“I played in it the last time it was here too when we just missed out in the final, so I want to go one better this year.
“We have enjoyed playing in our own conditions over the last couple of years. There’s no room for slip-ups but we are confident in ourselves and that is our focus.”
The England players are currently in Spain for a warm-weather training camp before the first of three Royal London ODIs against South Africa takes place on 24 May at Headingley.
Buttler, who has just returned from a six-week spell playing for the Mumbai Indians in the IPL, believes South Africa will provide the perfect preparation for the Champions Trophy and is looking forward to hosting the best teams in the world.
“South Africa will be a really tough challenge straight before the tournament, which should really stand us in good stead in terms of our preparation,” he added. “They are a fantastic side in one-day cricket.
“When you look at the tournament, anyone could win it, especially with the compact format. We have been playing well and being in our own conditions potentially gives us an advantage, but it’s down to us to go and play well to take advantage of it.
“We are playing in some great venues. The Oval is one of my favourite places to play and we’ve played quite a few one-day matches in Cardiff in recent years. There’s a nice golf course on the way!
“We also have really good memories of Edgbaston because that’s the ground where we first really came together as a side against New Zealand when we scored 408 in 2015.
“It’s a tough group. We know about Bangladesh’s strengths having played there in the winter. They are a strong side, especially with the ball in their own conditions, but they are vastly improved and we have to be wary.
“New Zealand and Australia are top sides, we know all about them. It’s a tournament of high quality and to win it we have to beat the best teams in the world.”
Buttler watched on from India as Sam Billings kept wicket for England against Ireland while Jonny Bairstow impressed with the bat in the convincing 2-0 series victory this month.
The wicketkeeper-batsman himself feels in good form following the IPL, where he produced a top score of 77 for Mumbai, and says competition for places keeps the players on their toes.
“There’s lots of competition for places in all departments – batting, bowling and keeping,” Buttler continued.
“There’s great depth in the squad and it’s been good to see other players doing well while a few of us have been away at the IPL.
“I feel in good touch. It was nice to go to the IPL, to be in a completely different environment. I feel confident, I’ve been seeing the ball well and hitting it well, so I’m excited about the summer.”