In the communique, the Party pledged to "effectively prevent and resolutely crack down on ethnicity-related separatist activities."
The Party would also launch massive, in-depth and persistent educational campaigns on ethnic unity to this end.
It was of "great significance" to manage ethnic work well and strengthen and develop a socialist ethnic relationship featuring equality, unity, mutual assistance and harmony, the document said.
"Under the new circumstances, we should continue to promote the progress of ethnic unity to ensure the country's long-term social stability and harmony," it said.
In the communique, the CPC said it would comprehensively carry out its ethnic policies and the system of regional ethnic autonomy to promote the economic and social development in ethnic areas.
A total of 194 full members and 163 alternate members of the CPC Central Committee attended the plenum, according to the communique.
Members of the CPC Central Commission for Discipline Inspection and top officials of relevant departments were also present at the session.
Some delegates to the 17th CPC National Congress who were in charge of Party affairs at the grassroots, and experts and scholars in this field, also attended the meeting.
Hu Jintao, general secretary of the CPC Central Committee, delivered a work report at the session, which was held in Beijing from Sept. 15 to 18 and presided over by the Political Bureau of the CPC Central Committee.
(Xinhua News Agency September 19, 2009)