Stable production method for product with small width-to-thickness ratio under wide galvanizing unit

The invention relates to the technical field of cold rolling zinc plating annealing, and particularly discloses a stable production method of a small-width-to-thickness-ratio product under a wide-width zinc plating unit, which solves the problem of off-tracking shutdown of small-width-to-thickness-ratio strip steel in the production of the wide-width unit by pre-controlling process parameters such as tension, plate temperature and speed in a furnace and adding the function of radar deviation correction and automatic speed reduction in the furnace. The method is divided into two control modes during strip steel specification transition and strip steel stability; according to the invention, the production problem that products with small width-to-thickness ratio are easy to deviate and shut down in a wide galvanizing unit is solved, the deviation shutdown frequency of the unit is reduced from more than 10% to less than 0.01%, the yield and qualification rate of the small width-to-thickness ratio are obviously i