The proportion of education investment is a dynamic index, which will change with the development of national economy. The objective sign of the reasonable proportion of education investment in the national economy is whether education investment adapts to the recent education development; In the long run, whether the labor force and professionals trained by education are compatible with economic and social development and coordinated with the proportion of the national economy, especially the proportion of accumulation and consumption.

The change of the proportion of education investment directly affects the change of the total education investment. Therefore, it is of great significance to follow certain principles and reasonably determine the proportion of education investment. Determine the rationality of the proportion of education investment in the national economy and follow the following principles:

(1) growth principle

The principle of growth means that for a developing country, because its economic development started late, the proportion of education investment is generally low. In order to speed up the modernization process and promote economic development, it is necessary to increase education investment and adopt the principle of increasing the proportion of education investment, so that the proportion of education investment will increase with economic growth.

(2) the principle of advanced growth

The principle of advanced growth means that if a developing country has set a high social and economic development goal and needs to vigorously develop, introduce and apply high and new technology, it must adopt the principle of advanced growth in the proportion of education investment, so that the growth rate of education investment is faster than that of the national economy and exceeds that of the national economy.

(3) the principle of mitigation and stability

The principle of slowing down and stabilizing means that when a country's economic development reaches a fairly high level, the proportion of education investment growth and the proportion of advanced growth gradually slow down and stabilize, so that the proportion of education investment growth and the proportion of advanced growth gradually slow down with the proportion or speed of national economic growth until it is stable in the best state of simultaneous development of education investment growth and national economic growth.

(4) the principle of elastic coefficient

Elastic coefficient means that when an index of the national economy reaches a certain value, the proportion of education investment should have a corresponding elastic growth value.

In short, if the proportion of education investment in the national economy is carried out in accordance with the above principles, then the proportion of education investment is reasonable, otherwise it is unreasonable.