The new data, included in a daily situation report published by the health ministry, bring the total number of confirmed cases to 452 since the outbreak of the rare Bundibugyo strain of Ebola was announced on May 15.
There have been 82 confirmed deaths.
The cases remain heavily concentrated in Ituri province in northeast DR Congo, a remote part of the country with poor health infrastructure and widespread insecurity due to fighting by armed groups.
The daily total of 71 new cases - 65 in Ituri province and six in North Kivu province - is one of the biggest during the outbreak, the 17th in DR Congo's history.
"The number of confirmed cases recorded in the two provinces demonstrates rapid and continuous community transmission," the situation report said.
Cases have been confirmed in 17 of Ituri's 36 health zones, as well as in seven health zones in North Kivu and one health zone in South Kivu, the report said.
There are also cases in neighbouring Uganda.
Earlier on Friday, World Health Organisation director-general Tedros Adhanom Ghebreyesus announced a $US518 million ($A735 million) six-month plan to fight Ebola, calling for money and political commitment to halt the spread of an outbreak that is already the fourth-biggest on record.
"We're not starting from zero, this plan draws from previous outbreaks and recent health emergencies," Tedros said, announcing a joint plan with Africa Centres for Disease Control and Prevention from June to November.
"Containing Ebola requires political commitment, sustained finances and trust in engaging the communities," he said.
The strategy aims to help DR Congo and Uganda contain their outbreaks while assisting other countries to prepare for possible cases through measures including enhanced border screening, the WHO and Africa Centres for Disease Control and Prevention said.
The epidemic went undetected for weeks, the Africa CDC said at the same briefing, leaving health authorities behind the curve and struggling to bring it under control.
The outbreak involves the rare Bundibugyo strain of Ebola, for which there is no approved treatment or vaccine.
"This outbreak is very serious. If you compare with previous Bundibugyo outbreaks this is the most serious Bundibugyo outbreak we have," Africa CDC director-general Jean Kaseya said.
The Africa CDC announced DR Congo's 17th Ebola outbreak on May 15, and the WHO soon after declared it a public health emergency of international concern.
Testing has been a challenge, as commonly used Ebola tests initially failed to detect the Bundibugyo strain, while delays persist in obtaining results.
"It's taking several days to a week or more. And that's frustrating," said Franklin Graham, president of Christian aid group Samaritan's Purse, which is working in DR Congo's Ituri province.
Mistrust and resistance have also hampered the response, with attacks on burial teams and treatment centres reported.
Highlighting security risks, the WHO said on Friday it had received three armoured vehicles from the United Nations peacekeeping mission in DR Congo.
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