投资规模是否合理，是决定能否实现国民经济持续稳定增长、物价平稳、充分就业和国际收支平衡等宏观经济目标的重要因素。新中国建国50多年来，我国曾经出现过几次较为严重的宏观经济失控，在很大程度上都是由投资规模不合理引发的，具体表现为投资规模不是过大就是过小，并由 Whether the investment scale is reasonable or not is an important factor in deciding whether to achieve the macroeconomic goals of sustained and steady growth of the national economy, stable prices, full employment and the balance of payments. Over the past 50 years since the founding of New China, several serious macroeconomic runaway incidents in our country occurred to a large extent due to the unreasonable investment scale. The concrete manifestation is that the investment scale is either too large or too small,