"The Chief Minister's activities are being widely published in the media which amounts to campaigning. Why is the Election Commission so generous towards him?" she asked.
She accused the poll panel of wrongly favouring BJP leaders.
"It is impossible to have free and fair elections if the EC continues to turn a blind eye to the activities of BJP leaders," she said.
Mayawati alleged that the BJP and Prime Minister Narendra Modi seemed nervous and the real reason for this was the party's anti-Dalit and anti-Muslim deeds.