The invention discloses a smoke filter equipment used in petroleum refining process. Its structure includes a filter body, a filter plate assembly cover plate, a power on and off controller, a support base plate, and a miscellaneous box. The filter body is a cuboid, and the right side of the front end is inlaid The filter plate assembly cover is fastened, and the support bottom plate is welded on the front and rear sides of the bottom. The mechanism composed of springs, gears, chains, electromagnets, etc. enables the equipment to automatically switch between multiple spare filter plates at regular intervals, and can automatically lower and retract the front filter plates when switching to use, so that when the equipment is in use It can better prevent the filter drop, clogging and flue gas recirculation caused by the long-term use of the filter plate. It can also replace and clean the filter plate during work, and can perform secondary filtration, and can filter the impurities in the secondary filter. Automatic collection for ease of use.