The invention discloses a convenient and fast street lamp replacement device and belongs to the electromechanical field. The convenient and fast street lamp replacement device comprises a lamp base and a lampshade; the two ends of the lamp base are each provided with a fixed pulley; a fixing wire penetrating hole is formed in one end of the lampshade; a fixed pulley is arranged at the other end of the lampshade; the convenient and fast street lamp replacement device further comprises a steel wire rope; after the steel wire rope penetrates all the fixed pulleys of the novel lampshade and the novel lamp base, one end of the steel wire rope is fixed to the wire penetrating hole; and by means of the function of the steel wire rope, the lamp base and the lampshade can be fast separated or meshed so that a bulb can be fast repaired or replaced. The convenient and fast street lamp replacement device has the beneficial effects that the bulb can be easily and fast repaired and replaced, and potential safety hazards of repairing and maintaining of a traditional street lamp are reduced.