The 34-year-old - looking to complete his disputed move from Shanghai Shenhua - flew in from the African Nations Cup, where he had been playing for the Ivory Coast until their defeat against Nigeria.
And he was greeted by hundreds of fans at the airport.
"I'm very happy to be here for me as it's a new adventure, a new part of my life," he told the club's website. "I will do my best to be successful for the club."
His former club Shenhua Shanghai have said they will challenge the deal, insisting Drogba remains under contract with them.