"An election is a mechanism to end conflicts due to different political views in one of the best and most peaceful manners," Yingluck said in a message on her Facebook page.
"This election will be one of the most meaningful elections as it will be a guiding light to the determination of Thailand's future on the democratic path."
The caretaker premier's determination to press ahead with the polls has inflamed tensions in a country wracked by nearly three months of opposition protests, often violent.
More military personnel will be deployed in areas where violence or unrest is imminent, deputy army spokesman Winthai Suvari said.
The Royal Thai Police would deploy most, if not all, of its forces at polling stations to prevent any possible attempt by protesters to disrupt the election.
Over, 2,00,000 police officers would be assigned to ensure security at 93,535 polling stations in 77 provinces, said Amnart Unartngarm, assistant national police chief.
They accuse Yingluck of being a puppet for her fugitive brother, former premier Thaksin Shinawatra, who was ousted in a coup in 2006. He lives in self-exile in Dubai.
The anti-government People's Democratic Reform Committee (PDRC) has vowed to disrupt the polls by enforcing a complete shutdown of Bangkok and holding mass rallies on polling day, prompting the army to deploy more troops.
Labour Minister Chalerm Yoombamrung, in charge of enforcing a 60-day emergency imposed last week, urged protesters not to disrupt the vote.
He yesterday warned protesters against disrupting voting and said: "Those who are thinking of going and shutting polling stations in the morning should think twice because the police will not allow them to.
