At least 196 people were detained across the country on Sunday, the human rights group Spring-96 said.
Those protests have been brutally repressed - a recent strategy by Tsikhanouskaya's female supporters face off police, as the police have seemed reluctant to be as violent with women than they have been with male protesters. Police said 330 of them remained in custody as they await hearings in court.
And she urged the European Union to make a formal call for new elections - something it has so far held off from, despite rejecting the 9 August poll as illegitimate.
Tensions are continuing to simmer across the nation, with hundreds of soldiers blocking off the centre of Minsk, while protests also took place in several other cities, including Brest and Grodno.
Lukashenko, who has run the ex-Soviet nation of 9.5 million with an iron fist since assuming office in 1994, repressing opposition and independent media, has rejected suggestions of dialogue with the opposition.
Amid worldwide outrage, Belarussian authorities switched to prosecuting top activists and mass detentions, avoiding large-scale violence. The opposition did not agree with the election results and created a coordination council, most of whose members became involved in a criminal case on an attempt to seize power. She was charged last week with calling for "actions aimed at undermining Belarusian national security".
Anonymous hackers dripped the personal data of 1,000 Belarusian police officers in retaliation for a crackdown on street presentations versus veteran President Alexander Lukashenko, as protesters gotten ready for another mass rally on Sunday.
"As the arrests continue, we will continue to publish data on a massive scale", said a statement distributed by the opposition news channel Nexta Live on the messaging app Telegram. Police opened an investigation into the leak.
The debate on the rights situation in Belarus, requested by the European Union, focused on violations and the crackdown on the unprecedented demonstrations which broke out after disputed August 9 elections.
Friday's debate is expected to end with a vote on a draft resolution tabled by the European Union decrying numerous allegations of "torture and cruel, inhuman or degrading treatment or punishment by law enforcement and prison officers, including in prisons and detention centres, which urgently require an independent investigation".
Although Belarusian opposition leader Sviatlana Tsikanouskaya called for a so-called courageous response against President Alexander Lukashenko, EU foreign ministers failed to agree on sanctions because of a Cypriot veto.
"Canada will continue to work toward a peaceful and inclusive resolution to this crisis while holding Belarus to its OSCE commitments to human rights and democracy", Champagne said.
Lukashenko has used force and detentions in an effort to end them.
Speaking from exile in Lithuania, Sviatlana Tsikhanouskaya, who was Mr Lukashenko's main election opponent, said: 'Every Sunday, you are showing yourselves and the world that the Belarusian people are the power'.