Remarkable achievements have been made since the Belt and Road Initiative was proposed five years ago.China's investment liberalization and facilitation have been enhanced greatly and its investment abroad has become an important engine driving the increase of global foreign direct investment.But meanwhile，there remain problems regarding China's investment in the countries along the Belt and Road.For instance，the investment is imbalanced in terms of space and industry distribution，the completion rate of cross-border mergers and acquisitions is low，the profit status of overseas economic and trade cooperation parks is worrying and the guarantee of bilateral investment treaty is not very effective.Therefore，China needs to start from a top-level design and promote cooperation with the Belt-and-Road countries in investment field through continuously optimizing the facilitation of foreign direct investment，scientifically evaluating the oversea targets of state-owned enterprises' mergers and acquisitions，adopting localization and diversified business models in the economic and trade cooperation parks and reconfiguring bilateral investment treaties.