The invention discloses a LED street lamp capable of efficient heat dissipation. The LED street lamp comprises a controller, a solar cell panel, a lamp pole, a bottom plate and a top plate. Multiple heat dissipation holes are formed in the side wall of the lamp pole, multiple LED light-emitting units are arranged on the side wall of the lamp pole, a wireless communication unit is fixed to the topplate, and a heat dissipation fan is arranged in the lamp pole; and a first storage battery containing cavity and a second storage battery containing cavity are formed in the bottom plate, a verticalconnecting channel and a horizontal connecting channel are formed in the bottom plate, a first fixing block and a second fixing block are fixed on the upper surface of the bottom plate, and the firstfixing block and the second fixing block are each provided with a channel with an opening. The street lamp provided by the invention is good in heat dissipation effect, is particularly suitable for being used by a square, and is flexible to use.