Mikel is leaving Chelsea with a record of 372 appearances for Chelsea since he joined the English club 2006.
He told his fan it was “an honour” to play for the Stamford Bridge club but it was time to “seek a new challenge”.
The 29-year-old Nigerian midfielder won two Premier League titles, four FA Cups and the 2012 Champions League during his time in Chelsea.
“I haven’t featured as much this season as I would have liked and I still have many years in the game ahead of me,” Mikel said in a tweet to Chelsea fans.
“With this in mind, I feel now is the time to seek a new challenge.
“I’m delighted to be joining Tianjin TEDA FC at a time that the Chinese Super League is really taking off, and I look forward to helping Tianjin TEDA FC continue to grow.
“To play in the Premier League is every professional player’s ambition” Mikel declared.
Mikel is the second Chelsea player to move to the Chinese Super League in recent weeks after Oscar’s transfer to Shanghai SIPG.