The militants, who handed over their arms to authorities here on Friday, belong to the Baloch Republican Army (BRA), Baloch Liberation Army (BLA) and other separatist groups alleged to have carried out attacks on security installations and personnel in the troubled province.
Commander Southern Command Lieutenant General Amir Riaz said on the occasion that those wanting to return to normal life were welcome to do so after surrendering.
"Anyone laying down their arms would be welcomed," he said.
The militants pledged their allegiance to the state of Pakistan at the ceremony, which was also attended by the provincial chief minister.
Pakistan has been battling insurgency in mineral-rich Balochistan since 2004, with hundreds of soldiers and militants killed in the fighting.
"These militants had killed my own son and brother but I have forgiven them. The state of Pakistan also forgives them and I welcome them to be part of Balochistan's CPEC project," said Balochistan chief minister Sanaullah Zehri at the ceremony.