Abstract：Rosa Luxemburg was an outstanding Marxist theorist, and her ideas enriched and developed Marxism.Luxembourg political parties' theoretical background is "to serve the people" thought and democracy which are emphasized by Marx and Lenin.Their political ethics have a wealth of contents: as for the value of the party, the proletarian party should represent the fundamental interests of the majority;for the institutional ethics, the proletarian party should adhere to the principle of democratic centralism within party and resist the spread of bureaucracy, whose party members, especially leaders, should have moral merits.Luxembourg's political ethics are still of great practical value in the contemporary era.

Keyword：Luxembourg;political ethics;people;democracy;