A coalition of 25 environmental, consumer and labor groups has urged President Carter to take an active role in blocking business efforts to alter the content of regulatory reform legistation.

Warning against the crippling of the federal regulatory system, the groups called on Carter to consider vetoing any reform legislation that contains formal cost-benefit provisions, the legislative veto, sunset and presidential authority to intervene in rule-making.

"Many corporate lobbies are now striving not for regulatory analysis but regulatory paralysis, not for reform but abolition," they said.

"Unable previously to persuade Congress or the courts to ignore market, workplace and environmental abuse, these special interests are engaged in a propaganda war on health/safety regulation," they said.

The letter to Carter, sent Friday, comes as the Senate administrative practices subcommittee is on the verge of marking up sweeping regulatory reform proposals by Carter and others.

Although the subcommittee, chaired by Sen. John C. Culver (D-Iowa), was to begin marking up the bill last week, those sessions were delayed by Culver in an effort to try to prepare a consensus bill with Republican leaders.

The letter, prepared by Mark Green, the director of Ralph Nader's Congress Watch, was also signed by leaders of the National Wildlife Federation, the United Steelworkers of America, the Sierra Club and the United Auto Workers.

The organizations charge that business groups have exaggerated the costs of regulatory activity, ignore the health and safety consequences of regulation and inaccurately assume that the public does not support regulation. r

"To counter this propaganda campaign and to protect life-saving and dollar-saving regulatory law enforcement requires forceful leadership," they wrote.