The invention discloses a PWM-wave-controlled electromagnetic relay driving circuit and an implementation method. The electromagnetic relay driving circuit comprises a microprocessor module and a control circuit, wherein the control circuit comprises a driving circuit power supply, an electromagnetic relay, a freewheel diode, a triode and resistors, wherein both ends of a main contact coil of the electromagnetic relay are connected with the freewheel diode in parallel, a negative electrode of the freewheel diode is connected with the driving circuit power supply, a positive electrode of the freewheel diode is connected with a collector of the triode, the driving circuit power supply is subjected to voltage division through the resistors and connected to an A/D port of the microprocessor module, a PWM wave generated by an I/O port of the microprocessor module controls a base of the triode, and an emitter of the triode is grounded through one of the resistors. The PWM-wave-controlled electromagnetic relay driving circuit is simple in structure, saves cost, is fast in operation of the electromagnetic relay, and ensures safe and stable operation.