"The box that recorded flight parameters and the one with conversations in the cockpit have been handed over to judicial authorities," Reza Jafarzadeh, the public relations director of Iran's civil aviation organisation, told official news agency IRNA.
Jafarzadeh said the two black boxes of the Aseman Airlines ATR-72 were found on Saturday by rescue teams, who had resumed search operations in the Zagros mountains on Friday after bad weather forced them to halt efforts for nearly a week.
There have been no reported survivors from the plane's 66 passengers and crew.
The crash site has been hit by heavy snowfall in recent days, making rescue operations particularly dangerous due to avalanche risks, according to officials quoted by local media.
So far, only body parts have been recovered from the scene of the crash. Forensic teams have performed tests on 51 samples of human tissue in attempts to identify the victims, IRNA reported.