The utility model discloses a with scraping grey device before hot dipping zinc immersion plating, belonging to in batches, hot dipping zinc uses mechanized operation technique field. The device is including electronic dolly, electric putter, gear motor, pivot, bearing. Zinc pot both sides are equipped with the guide rail, are equipped with electronic dolly I and electronic dolly II on the guide rail respectively, are connected with electric putter I and electric putter's II lower extreme respectively on electronic dolly I and the electronic dolly II, gear motor fixes in electric putter's I upper end, and gear motor's output shaft is connected with pivot one end, and the other end of pivot is fixed on bearing, and bearing fixes on electric putter's II telescopic link, the below of pivot is equipped with scraper blade and infrared detector. The utility model discloses a hot dipping zinc uses when beating the ash manipulation with scraping grey device in pairs, distributes at zinc pot length direction's both ends respectively. The utility model discloses a hot dipping zinc beats greyly with the mechanization of scraping the preceding zinc bath surface of grey device during operation completion batch hot dipping zinc immersion plating, it is grey to replace traditional manual work to beat, improves operation environment.