The existence of investment multiplication is the basis for the selection of macro-financial policy and the inspection of the extent to exert financial policy.

Calculation and analysis of investment multiplier effect in our country;

Change trend and causes of the investment multiplier effect in our country;

Based on the analysis of the URT industry chain, the methodology of calculating the investment multiplier of URT is discussed by useing the input-output principle.

Through analyzing the conditions and formation of the investment multiplier effect, this paper demonstrates the leakages existing in the process of the investment multiplier effect, and makes the empirical analysis on the investment multiplier effect in Shanxi Province.