A report by the Resolution Foundation has found the Liberal Democrats' policies would mean 600,000 fewer children in poverty by 2023-24, making it the most progressive of the three main parties.
The report also found child poverty risks reaching a record high under Conservative plans.
Liberal Democrat Shadow Work and Pensions Secretary Tim Farron commented:
“This report is a damning indictment of the Tories’ heartless welfare policy, which is leading to soaring levels of child poverty across the country.
“Only the Liberal Democrats will stop Brexit and invest billions of pounds from the Remain bonus in building a brighter future for those struggling in our society. We would scrap the cruel two-child limit, benefit cap and bedroom tax, and invest in free school meals and childcare for millions of families.
“As the Resolution Foundation recognises, we have the most progressive policy of all the major parties, focused on ensuring everyone has the same opportunities regardless of where they come from.”