A resolution adopted on the second and concluding day of the party's tenth state conference here pointed out that death sentence had been struck off the statute book in 140 nations.
Noting that the government had so far not acted on the persistent pleas against capital punishment, it said the DMK President had also been insisting on abolishing death sentence "which can only take away lives in an inhuman manner".
"Change of heart is needed for eradicating crime and death penalty will not be an appropriate solution to this. Hence, the Centre must bring amendments to the law to end death penalty," it said.
Another resolution demanded that India move a separate resolution in the United Nations Human Rights Council (UNHRC) meet next month for an independent inquiry into alleged war crimes in Sri Lanka in 2009, besides its backing to the US resolution.
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It also wanted a UN-monitored referendum to be conducted in Sri Lanka to allow the Tamils there to evolve a political solution for themselves.
Accusing the Central government of adopting different yardsticks on imposing service tax on storage of rice and cotton while leaving out wheat, yet another resolution demanded withdrawal of the levy.