The invention discloses a solar LED street lamp with a high-efficiency heat dissipation function. The solar LED street lamp comprises a base, wherein the upper end of the base is provided with a mainbody, the top end of the main body is provided with a solar panel, the main body is internally provided with a battery used for storing electric power generated by the solar panel, and the main body is internally provided with an illumination device for illumination. The solar LED street lamp has the advantages that the structure is simple, the maintenance is convenient, a liquid medium can be used for continuously cooling an LED light source, the use temperature of the LED lamp is maintained, the waste heat can be recycled, and the energy utilization rate is increased, therefore the solar LEDstreet lamp has high use and popularization value.