中国共产党百科∣开除党籍 expulsion from the Party

Expulsion is the ultimate form of disciplinary action within the Party. In deciding on or approving an expulsion, Party organizations at every level shall look into all documentation and opinions related to the case with circumspection.
开除党籍是党内的最高处分。各级党组织在决定或批准开除党员党籍的时候，应当全面研究有关的材料和意见，采取十分慎重的态度。

The expulsion from the Party of a member or alternate member of the Central Committee who has committed a serious criminal violation shall be decided upon by the Political Bureau of the Central Committee; the expulsion of a member or alternate member of a local Party committee at any level who has committed a serious criminal violation shall be decided upon by the standing committee of the Party committee at the corresponding level.
严重触犯刑律的中央委员会委员、候补委员，由中央政治局决定开除其党籍；严重触犯刑律的地方各级委员会委员、候补委员，由同级委员会常务委员会决定开除其党籍。