NOVELTY - A solar lawn illumination device comprises a solar panel, storage batteries, an LED lamp and a control device. The solar panel is used for charging the storage batteries. The storage batteries are used for supplying power to the LED lamp under control of the control device. The control device is made up of an independent control chip and a light sensing element.    USE - A solar lawn illumination device.    ADVANTAGE - In the solar lawn illumination device, control circuits are integrated on an integrated circuit chip, and the shortages of large energy consumption, high material dissipation and poor waterproof performance resulting from separated elements are overcome. An over-charging protective module for avoiding over-charging of the storage batteries is added to the chip, which ensures the charge safety of the storage batteries.    DETAILED DESCRIPTION - A solar lawn illumination device comprises a solar panel, storage batteries, an LED lamp and a control device. The solar panel is used for charging the storage batteries. The storage batteries are used for supplying power to the LED lamp under control of the control device. The control device is made up of an independent control chip and a light sensing element. The control chip includes a rectifying, detecting and over-charging protective module, an over-discharging protective module, a booster drive module, a current-limiting control module, a timer module, a central control module and a control switch. Input end of the rectifying, detecting and over-charging protective module is connected with output end of the solar panel for rectify and detect current output by the solar panel. Rectification output end is connected to charging end of the storage batteries. If voltage in detection result exceeds the maximum input voltage of the storage batteries, the end of the solar panel is disconnected from the storage batteries. Input end of the over-discharging protective circuit is connected with the storage batteries. When output voltage of the storage batteries is higher than the minimum work voltage, the storage batteries are connected with input end of the booster drive circuit. When output voltage of the storage batteries is lower than a set value, the storage batteries are disconnected from the booster drive circuit. The booster drive circuit boosts output voltage of the storage batteries to rated voltage output of the lawn lamp and accesses it to input end of the current-limiting control circuit. Control input end of the current-limiting control circuit is connected with the timer. When the timer does not reach the set time, output voltage of the booster drive circuit is connected to the lawn lamp by a control switch controlled by the central controller according to a first rated current of the lawn lamp. When the timer reaches the set time, output voltage of the booster drive circuit is connected to the lawn lamp by a control switch controlled by the central controller according to a second rated current of the lawn lamp. The control switch is connected between the current-limiting control circuit and power input end of the lawn lamp. The timer module includes a time setting interface and its output end sends a signal when the timer reaches the set time. The central control module includes an enabling control module and a mode control module. Input end of the enabling control module is connected with output end of the light-sensing element. When environment brightness output by the light-sensing element is less than a minimal set value, the circuit from the storage batteries to the control switch is put through. The mode control module is provided between the timer and the control switch. When the timer reaches the set time, the control switch is controlled to control the LED lamp to work according to the second rated current way.