Energy -saving automatic control switch circuit

The utility model discloses an energy -saving automatic control switch circuit, its characterized in that, it is by diode rectifier U, the steady voltage filter circuit who is connected with the diode rectifier U output, the illumination detection circuitry and the trigger circuit that are connected with steady voltage filter circuit to and the control circuit who is connected with illumination detection circuitry constitutes, the utility model discloses can come lighting or extinguishing of automatic control street lamp according to the illumination intensity of environment, avoid extravagant in a large number because of forgetting to close the electric energy that the street lamp caused.