The invention discloses desulfurization and smoke removal equipment for metal casting processing, which comprises a vertical pipe and an exhaust pipe communicated with the vertical pipe, an exhaust fan is arranged in the exhaust pipe, an iron cylinder is embedded in the vertical pipe, two capacitance plates are symmetrically embedded on the side wall of the vertical pipe, a power supply device for supplying power to the capacitance plates is arranged in the exhaust pipe, a material collecting cup is arranged at the lower end of the iron barrel, two scraping plates are connected to the inner wall of the iron barrel in a sliding mode, and a driving device for driving the scraping plates to move is arranged on the material collecting cup. By arranging the iron cylinder, the capacitance plate, the power supply device and the like, the power supply device can operate when the exhaust fan extracts smoke, so that the capacitance plate can supply power, electrostatic charges are gathered on the capacitance plate, meanwhile, the suspended iron cylinder generates induced electrification, dust and other impurities in the smoke can be adsorbed through electrostatic force, the harm of the smoke is reduced, and meanwhile, impurities are prevented from falling back to influence metal casting processing.