The utility model discloses a multifunctional energy-saving and water-saving solar tree lamp which comprises a solar LED lighting unit, a charging unit and an irrigation control unit. The solar LED lighting unit comprises a solar cell panel, a solar tree body, an LED lamp, a storage battery and a solar charge controller, wherein the solar cell panel is arranged at the top end of the solar tree body, the solar cell panel and the LED lamp are both connected with the storage battery through the solar charge controller, and the solar charge controller is arranged at the bottom end of the solar tree body. The charging unit comprises a voltage transformation and voltage stabilization module and a charging interface. A humidity sensor, an analog-digital conversion module, a processor, an electromagnetic valve driving module and an electromagnetic valve are sequentially connected. The multifunctional energy-saving and water-saving solar tree lamp uses solar to light and can provide lighting for places of parks, squares and the like. The multifunctional energy-saving and water-saving solar tree lamp has an intelligent irrigation control function. When soil needs to be irrigated, the irrigation control unit can irrigate the soil in real time, and urban green land irrigation water is saved. The multifunctional energy-saving and water-saving solar tree lamp can utilize solar energy to emergently charge parts of electronic products.