"While the country is going through political anarchy, Congress has created social and economic anarchy. Modi will give a strong government and save the country," he said.
Ramdev said from March 24, his followers would launch a door-to-door campaign in support of 'Modi for PM'.
He claimed Congress will get less than 100 Lok Sabha seats and BJP will get 300 seats while backing Modi for the top post.
The focus was not just Modi, but "issues" like corruption and black money, he told reporters after meeting his supporters here.
"There will be a big polarisation," and BJP will get the said number of seats. The yoga guru, who had recently shared dais with the Gujarat Chief Minister, said attempts were being made to paint Modi as "anti-Muslim".
"Riots have not happened in which government? Whether Congress, CPI-M or SP, riots have happened. Efforts are being made to paint Modi as anti-Muslim but he thinks of their welfare," Ramdev said in response to query on 2002 riots in Gujarat during Modi's rule.
Muslims have been made "scapegoat" but the community members are intelligent and will vote for Modi, he claimed.
Asked about Modi's pro-Corporate image, he said the BJP leader, if elected as Prime Minister, should work with primary focus on local industries.
Taking a dig at AAP and the expulsion of rebel MLA Vinod Kumar Binny, he said this showed there was no internal democracy and the high command culture has crept into it.
AAP's image has taken a beating, especially following the recent "drama" where party leader and Delhi Chief Minister Arvind Kejriwal took to the streets against the Delhi Police, he said, adding, the party which intends to contest elections from Gujarat, will lose there.
The yoga guru, who was earlier associated with Kejriwal, said the party may get 5-10 seats in the Lok Sabha polls, that too only if the top leadership changes its ways.
Ramdev said a massive Yoga Mahotsav will be held across the world on March 23 with an estimate 12 crore people participating in it.