The invention provides a streetlamp with an advertising board. The streetlamp comprises an outer barrel body and an inner barrel body, which are made of a transparent material, wherein a hollow structure is arranged between the inner barrel body and the outer barrel body for mounting a lamp bulb of the streetlamp; the advertising board is posted on the inner wall of the inner barrel body; a flowerpot is mounted on the top of the inner barrel body; the bottom of the streetlamp is fixedly connected with a lamp post; a motor is mounted on the lamp post; the motor drives the lamp post to rotate; ahydraulic cylinder is arranged above a supporting base; a hydraulic pump is arranged at one side of the hydraulic cylinder; and a telescopic pole is connected between the hydraulic cylinder and the motor. The streetlamp has the beneficial effects that: the advertising board and the streetlamp are combined together, and the cylindrical rotatable streetlamp drives the advertising board to rotate, so that the crowd can see the advertising board from multiple angles, and the advertising effect also can be guaranteed while the streetlamp is light at night; and the flowerpot can be arranged on thetop of the streetlamp for planting green plants, so that the city is beautified, and the environment is protected; and a bottom lifting structure is convenient for reducing the streetlamp to maintainthe green plants and replacing advertisement from the top.