The body said the funds were recovered between a high-profile meeting of Party leaders in November 2012 and June this year.
Favoured people and businesses who were illegally given tax breaks have also had to return the money, it added.
Since assuming power in late 2012, President Xi Jinping, who doubles as party and military chief, has pursued a relentless campaign against pervasive corruption, vowing to go after powerful “tigers” as well as lowly “flies”.
The biggest “tiger” snared so far is Zhou Yongkang, 72, who the government said last month had been jailed for life for bribery, leaking state secrets and abusing power following a closed-door trial in May.
The leadership has targeted a variety of sectors in its anti-graft campaign including state-owned enterprises, the energy sector and the military.