The embodiment of the utility model discloses solar energy and commercial power complementation LED street lamp control system, the system includes: solar energy power module, control module, LED lighting load and mains supply module, solar energy power module includes battery and solar cell panel and voltage control circuit, the battery with solar cell panel links to each other and saves the electric energy, hold battery output voltage process the output of voltage control circuit LED lighting load 's operating voltage, on the basis of regarding as the power supply of the important energy at solar energy, with the commercial power as standby energy. Use the utility model discloses, during whole circuit the normal power supply, LED load supply power can be given to the battery, and when the not enough time spent of battery voltage, LED load supply power can directly be given to the commercial power, prevents the situation that leads to the LED load not work when battery voltage is not enough. Meanwhile, the time can appropriately reduce the capacity of battery in the preparation, reduce system's cost.