Through th ecomparative analysis of industrial inveestment space-time of Chongqing and its 40 districts(or counties),this paper finds that the tertiary industrial investment scale proprtion is not coordinative,that investment capital and investment efficiency are not proportionate,that investment space distribution is not equilibrium and that regional economic gradient and investment gradient are not consistent.The analysis reveals that the above features are mainly caused by the difference in natural endowment,social and economic development level,national policy and regional financial policy.The suggestion for optimizing Chongqing's industrial investment structure are put forward from such three perspectives as investment scale.investment efficiency and space distribution.