The party's state council adopted a resolution in this regard on Monday, CPI (M) state secretary G Ramakrishnan said.
The Act "is like a preventive custody" of a person without proper inquiry, he said adding it was an 'undemocratic Act.'
"Lodging someone in jail without proper inquiry is against natural justice, law and human rights. There is a danger of it being used against political opponents," he said.
The Assembly had passed two amendments to the Tamil Nadu Prevention of Dangerous Activities of Bootleggers, Drug-offenders, Forest-offenders, Goondas, Immoral Traffic offenders, Sand-offenders, Slum-grabbers and Video Pirates Act, 1982, popularly known as Goondas Act, bringing even first time sexual offenders and cyber crimes under its ambit.