The utility model relates to the technical field of engines, in particular to an engine oil atomizer dismantling tool used for conveniently dismantling an engine oil atomizer. According to the technical scheme, the engine oil atomizer dismantling tool comprises a sliding hammer, a slide rail, a fixing portion and an impact portion; the impact portion is arranged at one end of the slide rail, and the fixing portion is arranged at the other end of the slide rail and provided with a first threaded hole used for locking an oil atomizer threaded column; the sliding hammer is arranged on the slide rail and located between the fixing portion and the impact portion, and the sliding hammer can impact the impact portion when sliding in the sliding track direction of the slide rail. According to the engine oil atomizer dismantling tool, after the fixing portion is locked on the oil atomizer threaded column through the first threaded hole, a user can slide the sliding hammer to enable the sliding hammer to slide on the slide rail back and forth, so that the impact portion at one end of the slide rail is impacted by the sliding hammer, the fixing portion is driven to exert shaking force and tension force on the oil atomizer to enable the oil atomizer to be shaken to be loosened from an engine, and the oil atomizer is pulled out of the engine.