The downbeat report sets a gloomy scene for this week's G20 meeting in Cannes, where world leaders will discuss proposals for Asian nations to help to stabilise the European sovereign-debt crisis.
The OECD argues that much of the present lack of confidence in the global economy is due to the prevarication of politicians.
It calls on G20 leaders to act together in the manner of 2008, where they successfully avoided "a second Great Depression".
It says eurozone leaders should implement the rescue package agreed at last week's Brussels summit "promptly and forcefully", but stresses more detailed information is needed, especially over how the firepower of the European bailout fund will be maximised.
It also recommends the European Central Bank should cut interest rates to support growth across the Continent.
The OECD's sobering message was reinforced by a report by the International Labour Organisation (ILO) yesterday, which argues that the global economy is on the verge of a new recession. Another slump, according to the ILO, is likely to trigger mass social unrest.
- Independent