Kai Havertz opened the scoring after defensive confusion for the homeowner in the eighth minute and Pulisic added the second goal with a huge shot from close range after just two minutes.
Chelsea completely dominated the first half, reaching 3-0 in half an hour after kick-off with a header from defender Kurt Zuma.
Palace improved after the break and Christian Benteke narrowed the lead with a header but Pulisic sealed Chelsea’s victory by following a cross from close range in the 78th minute.
And Chelsea began the match in sixth place after winning Leferball 2-1 against Aston Villa with a goal in injury time today.
But Chelsea won the biggest goal difference since Tuchel was appointed in January, overcoming Liverpool and West Ham United and regaining fourth place with 54 points from 31 games, two points behind West Ham, who face third-placed Leicester City on Sunday. Palace remained 13th.
وقال Tuchel “The first half hour was great. We were playing very hard and we cut the balls a lot in the last third.
“After 35 minutes, we got back a bit in possession of the ball and suffered a little. It continued like this in the second half, but we reacted well after receiving the goal.”
“We put pressure on ourselves to have the right response. This is a step in the right direction,” he added.
Chelsea’s first goal came when Mason Mount grabbed the ball at the edge of the area and passed to Callum Hudson-Odoi, who passed to Havertz to score the German calmly past goalkeeper Vicente Guaita.
Chelsea scored the second goal after a series of fast passes and before Pulisic fired a powerful shot from a narrow angle from the left side.
Mount implemented a free kick that Zuma converted from close range into the Palace goal, to continue full control of the visiting team.
The strong striker is trimmed Benteke The difference after he dealt well with a cross, but substitute Reese James sent a cross directly after participation and Pulsek diverted it from close range to a fourth goal.