Abstract: Using circuit model reconstruction and equivalent transformation，the RL circuit transient process is concisely analyzed with the help of meaningful physical models. When the final and initial states are selected as the reference ones，the full state response of RL circuit is illustrated as 1) a constant coefficient decay process and 2)the superposition of the zero state and the zero input state，respectively. Meanwhile，according to the research of the modern cognitive theory，this teaching process is helpful to active the information from memory，encode information in meaningful ways，form robust knowledge，and consequently，improve the teaching effect.

Key words: RL circuit, transient state process, attenuation