Iskandar Ehet, Turgun Tohtunyaz and Hasayn Muhammad have been executed, upon approval by the Supreme People's Court, the Kunming Intermediate People's Court said.
The three were convicted and sentenced to death in September 2014 after being found guilty of homicide and leading a terrorist organisation.
Their death penalties were upheld by the Yunnan Higher People's Court a month later, state-run news agency reported. During the terror attack, a group of assailants armed with knives slaughtered civilians at the railway station.

Thirty one people were killed and 141 others injured in the attack on March 1, 2014. Police shot dead four of the attackers and detained four others.
Another woman assailant Patigul Tohti, who was pregnant during her arrest has been sentenced to life. Xinjiang was on the boil for years over Uygurs resentment over the large scale settlements of Hans in the resource-rich province. Xinjiang has about 11 million Uygurs of Turkik origin.
The province witnesses large scale violent attacks reportedly carried by East Turkistan Islamic Movement (ETIM), an Al-Qaeda affiliated outfit which is leading a separatist movement.
It has carried deadly terrorist attacks in Beijing, Kunming and other cities also as a result of which China has stepped up security in Xinjiang and the rest of the country.

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