Marcos Alonso opened the scoring for the Blues, before Eden Hazard and Cesc Fabregas made it 3-0 and Olivier Giroud snatched a consolation in added time to make it 3-1.
However, despite opening up a 12-point lead at the top of the Premier League, N'Golo Kante has claimed the Blues will not get complacent.
"It wasn't the best we have played but it was important for us," N'Golo Kante told BBC Sport.
"The title is not finished, a lot of things could happen.
"When I was in France I just wanted to achieve the ambition of staying in French Ligue 1.
Chelsea player ratings from emphatic win over Arsenal
Sat, February 4, 2017
Express Sport brings you Chelsea's player ratings from their emphatic win over Arsenal at Stamford Bridge
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Express Sport brings you Chelsea's player ratings from their win over Arsenal
"I didn't expect to one day win a title.
"Last year what we [Leicester] did was amazing, this year we have not won anything."
Chelsea have now won eight of their last 10 league games.