The invention discloses a charge-discharge control circuit comprising an over discharge protective circuit and an over charge protective circuit. The over discharge protective circuit comprises a comparison circuit, wherein a first input end of the comparison circuit is connected with an alkali battery, a second input end thereof is connected with a lower limit reference voltage, and the output end thereof is connected with the input end of a driving control circuit; the output end of the driving control circuit is connected with an LED lamp; and the over charge protective circuit comprises avoltage regulator circuit, wherein the input end of the voltage regulator circuit is connected with a solar panel, and the output end thereof is connected with the alkali battery. The over charge protective circuit stabilizes voltage output by the solar panel to a set value through the voltage regulator circuit and then outputs the voltage to the alkali battery for charging, and the charging is stopped when the voltage at two ends of the alkali battery is equal to that at two ends of the voltage regulator circuit; and the over discharge protective circuit compares voltage output by the alkalibattery with the lower limit voltage value of the comparison circuit through the comparison circuit so as to output high-low level signals to control the switching on-off of a switch of the driving control circuit, thereby achieving the purpose of preventing the alkali battery from over discharge.