本文通过一些初中教学的实例，介绍一种解决物理实际问题的有效方法──“等效变通法”，这种方法的思想是：对物理公式中各个量进行交通替换、把新题型变通成基本题型等，从而使问题得到简捷解决．使用“等效变通法”能够拓展学生的思路、培养学生的发散思维能力．１公式变通 In this paper, through some examples of junior high school teaching, an effective method to solve practical problems in physics is introduced—“equivalent substitution method”. The idea of ​​this method is: to replace the various quantities in the physical formulae, and to convert the new question types into Basic questions, etc., so that the problem can be solved simply. The use of “equivalent alternatives” can expand students’ thinking and develop their divergent thinking skills. 1 formulae workaround