After converses with provincial pioneers Chancellor Angela Merkel said current measures would stay until 18 April.
Limitations will be considerably harder from 1-5 April, when most shops will be closed and social events will be restricted.
Mrs Merkel said Germany was presently in a "intense" circumstance.
"Case numbers are rising dramatically and serious consideration beds are topping off once more," the chancellor told a news meeting on Tuesday.
Covid diseases have been flooding across Europe as of late as nations scramble to immunize their populaces regardless of postponements in carrying out hits.
The contamination rate has increased over 100 for each 100,000 occupants in Germany. A further 7,485 contaminations have been accounted for in the previous 24 hours just as 250 passings. In different turns of events:
French clinics have conceded another 471 patients into concentrated consideration in 24 hours, and another 15,792 cases have been accounted for
Denmark's political chiefs have concurred a further facilitating of its lockdown, with more youngsters going to class from 6 April and stylists opening up once more
The Czech Republic says 25,000 individuals have now kicked the bucket with Covid-19 since the beginning of the pandemic, however diseases are well down on seven days prior.
Announcing the new restrictions after marathon crisis talks with the leaders of Germany's 16 states, Mrs Merkel said the highly contagious UK (Kent) variant of coronavirus had become dominant in Germany, plunging the country into what she called "a new pandemic".
"Essentially, we have a new virus," the German chancellor said. "It is much deadlier, much more infectious and infectious for much longer. " Germany was in a race against time to roll out vaccinations against the coronavirus, she added.
Tuesday's lockdown extension marks a reversal from earlier this month, when state leaders agreed to begin a cautious reopening process.