This paper analyzes the relationship between One Belt One Road Initiative （OBOR） and world economic growth. The world economic growth entered into a new paradigm of divergence and stagnation since the burst of global financial crisis. The risk of secular stagnation is increasing. Although there is ample demand for infrastructure investment around the globe，the emerging market and developing countries，especially Asian countries，often face a wide financing gap for potential infrastructure investment. If the B&R initiative proposed by Chinese government could operate smoothly and effectively，the above financing gap facing B&R countries should be mitigated significantly，thus there will be an extensive and intensive wave for infrastructure investment and a much brighter future for regional and even global economic growth. However，the key issue to fill financing gap is how to ensure the investment yields and secure the investment safety though careful and rational project design.