Control circuit of solar street lamp

The utility model relates to the technical field of solar street lamp control, in particular to a control circuit of a solar street lamp. The control circuit comprises a solar module, a voltage reduction module, a battery, a mains supply, a solar street lamp, a battery voltage sampling module and a main control module. The voltage reduction module is connected with the solar module, the battery, the mains supply, the solar street lamp and the main control module. The solar module charges the battery through the step-down module; the battery is connected with the solar street lamp; the mains supply supplies power to the solar street lamp through the voltage reduction module; the battery voltage sampling module is respectively connected with the battery and the main control module and is used for acquiring battery voltage and transmitting the battery voltage to the main control module; and the main control module is used for comparing the battery voltage with a preset voltage value, controlling the battery to s