The invention relates to an intelligent street lamp based on a 5G communication module. The intelligent street lamp comprises a controller, a wireless communication unit, a first mounting part, a second mounting part, a locking unit, a first photovoltaic unit, a second photovoltaic unit, a lower base, an upper base, a first plate sleeve, a second plate sleeve, a lamp holder support mounting plate,a lamp holder support and a lamp holder. Each of the first photovoltaic unit and the second photovoltaic unit comprises a photovoltaic mounting plate and a plurality of thin-film solar cell panels mounted at the photovoltaic mounting plate; a first upper vertical plate is arranged in the first plate sleeve and provided with a plurality of first through holes arranged up and down; an installationbox is fixed to the first upper vertical plate, a second upper vertical plate is arranged in the second plate sleeve and provided with a plurality of second through holes arranged up and down, and a sensor installation plate is fixed to the second upper vertical plate. The street lamp can be used for smart cities, and various devices used in the smart cities can be installed conveniently.