Method for preventing strip steel from buckling in annealing furnace

The invention belongs to the technical field of steel rolling and discloses a method for preventing strip steel from buckling in an annealing furnace. The method for preventing the strip steel from buckling in the annealing furnace includes the steps that the minimum running speed is controlled, and the running speed of the strip steel in the annealing furnace is controlled to be larger than or equal to the minimum running speed; the minimum running speed Vmin= V(w/Thi) X Fv(w) X fv(opt_strip_temp), Fv(w) is a minimum running speed _width coefficient, and fv(opt_strip_temp) a minimum running speed _temperature coefficient; V(w/Thi) is a minimum running speed cardinal number and is solved through V(w/Thi)=(1-sigma/sigma a) x Vmax; and Vmax is a theoretical maximum production speed accordingto the specification, sigma is unit tension, and sigma a is critical tension. The method for preventing the strip steel from buckling in the annealing furnace is provided, it is achieved that the strip steel buckling risk is