The invention, which relates to the technical field of LED driving power sources, discloses an LED driving energy-saving power source with the function of overvoltage protection. The LED driving energy-saving power source comprises a commercial power input circuit, an overvoltage protection circuit, a rectifier bridge, a driving chip U1, a power switch tube Q1, an NPN transistor Q2, a switch transformer T2 and a power output terminal. The driving chip U1 is connected to the power output terminal through the power switch tube Q1, the NPN transistor Q2, and the switch transformer T2 successively. The overvoltage protection circuit consists of a resistor, a trigger tube and a bidirectional silicon controlled rectifier. The switch transformer T2 provides power for the driving chip U1 by the NPN transistor Q2 and transmits a zero current detection signal to the driving chip through the NPN transistor Q2. According to the invention, with the overvoltage protection circuit formed by the resistor, the trigger tube and the bidirectional silicon controlled rectifier between the commercial power input circuit and a choking coil T1, the circuit can be protected effectively and conveniently, the self-recovery of the circuit is realized, and the maintenance cost is reduced.