IMF managing director Christine Lagarde has called on the US to help back-stop debt-ridden European countries, from bubbling into US political waters.

Speaking in the US capital, Ms Lagarde said the 187-nation International Monetary Fund needed more firepower to tackle financial crises raging around the globe, arguing it was in the US interest to pitch in and help Europe.

She also said the global economy is trying to dig out from deep recession, but the recovery remains very fragile, especially in Europe. 

She suggests that cutting government spending too quickly in developed countries like the US and larger European nations could make things worse, not better.

In prepared remarks to the Associated Press Annual Meeting, Christine Lagarde said that Europe's faltering would put the US economy and American jobs at risk.

"America has a large stake" in how Europe and the rest of the world fares, she added.

Lagarde said it is important to continue and expand emergency programs among the 17 countries that use the euro to help heavily indebted countries there and policymakers need "breathing space to finish the job."