通过理论分析建立了磨煤机磨煤量Ｇ和对应负载电流Ｉ之间的函数关系，继后在微机上对昆明钢铁总公司一轧厂风扇式磨煤机的实测实验数据进行回归分析，结果证明上述理论式和由实验得出的回归式在形式上是一致的；最后，对Ｉ─Ｇ函数式在理论上给予了解释，从而使该式具有一定的通用性。 Through the theoretical analysis, the function relationship between the grinding coal amount G and the corresponding load current I of the coal mill is established. Then the regression analysis of the measured experimental data of a mill mill in Kunming Iron and Steel Corporation is carried out. It is proved that the above theoretical formula and the regression formula obtained by experiment are formally consistent. Finally, I - G formula is given a theoretical explanation, so that the formula has a certain versatility.