The invention discloses a smart urban solar street lamp, comprising a base and a lamp post, a bottom inner wall of the base is provided with a slot, and the lamp post is inserted into the slot, and the outer wall of the lamp post is sleeved with a slot. The lamp canister, and the two outer walls of the lamp canister are fixedly connected with lighting lamps, the top inner wall of the lamp canister is provided with a stepping motor, and one end of the output shaft of the stepping motor is provided with a screw rod, and the top end of the lamp post is open There is a threaded groove, and the outer wall of the screw rod and the inner wall of the threaded groove are threadedly connected, the top outer wall of the lamp tube is provided with a photovoltaic mechanism, the base is provided with a fixing mechanism, and the surrounding inner walls of the lamp tube are all fixed and connected to a limited extent. bit rod. The invention enables the illumination intensity of the lighting lamp to be intelligently adjusted according to the surrounding environment, meets the requirements of energy saving and environmental protection, has better use effect, and cannot be disassembled from the outside, so that the street lamp has a certain anti-theft effect, and replaces the traditional bolt fixing method, so that Street lights are more stable as a whole.