David Cameron says he is determined to "get to grips" with tackling England's most troubled families by pledging a network of troubleshooters.
The government will provide £448m - but councils must provide 60% of funding.
Labour say ministers have cut Family Intervention Projects and the work councils had been doing on the issue.
Mr Cameron has promised to turn around the lives of 120,000 families by 2015.
Ministers say troubled families are costing the state an estimated £9bn a year in terms of spending on the NHS, the police and social services.
