Addrressing an election rally here, Shah referred to various allegations of corruption against the two Dravidian parties besides BJP's arch-rival, Congress.
He charged that DMK, AIADMK and Congress "are corrupt" and they did not "know anything other than corruption."
"DMK (is facing allegations) in 2G spectrum allocation and aircel-maxis.. How many scams are there against DMK," he said.
Targeting senior Congress leader and former Union Finance Minister P Chidambaram, Shah said he and his son Karti "were also facing charges," in an apparent reference to the Aircel-Maxis deal.
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"In AIADMK, there is a disproportionate assets case against Jayalalithaa," he said.
Shah also accused the state government of non-cooperation in taking the Centre's Mudra Bank scheme to wider sections of the society.
The BJP chief said his party was the alternative to DMK, AIADMK and Congress and asked the people to vote for it.
BJP is contesting the elections in tie-up with some smaller parties.