Badal told reporters after meeting the home minister here that he sought their release on humanitarian grounds.
"There are many prisoners who have served their sentence... There are people who are 80-90 years old. Some of them are blind. They have been in jail for 25-30 years," Badal said.
"On humanitarian grounds we are asking for their release," he said.
He emphasised that the demand did not make the Akali Dal "anti-national".
"Akali Dal has always fought for the nation, I am surprised how we are being branded anti-national," he said.
Badal said Rajanth Singh had promised to go through the list of prisoners submitted by him. Badal refused to share the list with the media.