The invention provides a breathing light circuit for teaching with an integrated operational amplifier assembly. In the circuit, an LM358 double operational amplifier U1 provides two operational amplifiers A and B; the operational amplifier A forms an oscillation circuit module; the operational amplifier B forms a constant current source module; in the oscillation circuit module, a capacitor C1 works under the continuously cyclic charging and discharging state; the voltage at two ends of the capacitor C1 displays an alternating process that the voltage continuously boosts or drops; and the voltage of the capacitor C1 is taken to control the constant current source module so that the breathing lamp effect that light emitting diodes which are connected with the output end of the constant current source module in series become light to dark and gradually become dark to light following changes of the voltage of the capacitor C1. The circuit is used to demonstrate the characteristics and the working principle of the integrated operational amplifier circuit so that the teaching experiment becomes interesting and can attract students to actively think about the circuit working principle at the back of the situation. Therefore, the experiment teaching quality can be improved and the students can preferably master the application of operational amplifiers.