Flight MU5735 of China Eastern Airlines was on its way from Kunming to Guangzhou on Monday when it nosedived and crashed in a remote, mountainous region. The cause of the deadly crash is yet to be determined.
CCTV said on Sunday that the second "black box" from the Boeing 737 passenger aircraft was found at the crash site.
There were 132 people on board the plane, including 123 passengers and 9 crew members.
On Saturday, China's civil aviation authorities said that the plane crash left no survivors.
The cockpit voice recorder from the Boeing 737 aircraft was found on Wednesday.