After the financial crisis in 2008,China has adopted the investment-led strategy for economic recovery.However,whether the investment scale is excessive has long been the focus of debate in economic and practical fields.This study,adopting real GDP growth rate,gross capital formation,the domestic credit provided by the banking sector,net inflow of foreign direct investment,market capitalization and CPI as the key system variables,analyzes the impact of investment on economic cycle by using VEC model and jud...