The invention relates to the field of street lamp technology, and particularly relates to a street lamp with a height adjustment function. The street lamp comprises a street lamp module and a control center, wherein the street lamp module includes a solar cell panel, a lamp pole, a lamp panel, a controller, a wireless communication module, a photosensitive sensor, a temperature sensor, a GPS positioning sub-module and an infrared sensor; the controller can detect the street lamp and the light conditions around the street lamp through the photosensitive sensor; the control center can determine whether the street lamp module has a fault according to the number of the street lamp and a control signal, and can send prompting messages including the number and address of a faulty street lamp to the maintenance personnel when detecting that the street lamp has the fault. According to the street lamp with the height adjustment function provided by the invention, the problem that the fault detection function of an existing street lamp is influenced by the own fault of the street lamp can be solved, the fault of the street lamp can be automatically detected, the maintenance personnel can be prompted, the efficiency of repair and maintenance of the street lamp can be improved, and higher stability and reliability can be achieved.