Method and system for controlling font sizes of labels of steel coils

The invention belongs to the technical field of printing control, and discloses a method and a system for controlling font sizes of labels of steel coils. The method for controlling the font sizes of the labels of the steel coils comprises the following steps of acquiring the string length m of information to be printed; acquiring the printable length n of a label of a steel coil; calculating a theoretical pixel value p of printable fonts according to the proportional relation between the string length m and the printable length n; selecting the corresponding font sizes according to the theoretical pixel value p; and printing the label of the steel coil according to the selected font sizes. The invention also provides a system for controlling the font sizes of the labels of the steel coils to implement the method. The method and the system are mainly used for controlling printing of printing media such as labels, and the printed fonts are maximized on the basis that the information is printed completely, and the font identification is improved.