【摘要】The long-term equilibrium relationship and short-term dynamics between investments and savings are both investigated in this paper. The result of co-integration test reveals that although there exists a positive long-term relationship between private saving, public saving and investment, the low correlation between private saving and investment is the key reason that restraints the effective formation of investment. A further impulse response function analysis based on the VAR system is used to study the dynamic relation between saving and investment, which demonstrates that an obvious lagged effect exists for the transformation of private to investment. Finally, it's concluded that a competitive and multi-channels mechanism of capital formation is crucial to transform savings to investments.