Governors and provincial assemblies in North Kivu and Ituri provinces will be suspended for 30 days.
The move comes as violence in the east of the country increases.
The Democratic Republic of the Congo will replace civilian authorities with military administrations in two conflict-hit provinces for a month, the government said on Monday, announcing the details of a state of siege to address worsening bloodshed in the east.
A surge in attacks by armed militias and intercommunal violence along Congo's border with Uganda have killed hundreds of people since the start of the year.
Under the state of siege, which was declared last Friday, governors and provincial assemblies in North Kivu and Ituri provinces will be suspended for 30 days from Thursday, government spokesperson Kasongo Mwema Yamba said in a statement read on the state broadcaster.