The IMF has cut its US growth forecast for this year to 1.7 percent, down from its previous prediction of 2 percent.
The US economy contracted nearly 3-percent in the first quarter, dragged down by a weak housing market, a slower pace of restocking by businesses and lower exports, on top of unseasonable weather.
The IMF also estimates emerging markets will grow by 4.6 percent this year, which is 0.2 percent lower than its previous estimate.
The IMF is now predicting China's economy is expected to slow to 7.4 percent through this year.
But the fund still expects the growth of the world's economy to accelerate a bit to 4 percent in 2015.
The IMF suggests that governments push ahead with economic reforms to increase their growth potential.
For CRI, I'm Su Yi.