Aiming at the quality control of large spherical mould,the manufacturing process of mould,sphericity error,spherical diameter error were researched,different algorithm on sphericity error and repairing mould algorithm on spherical screen were summarized,a mathematical model based on Matlab controlling algorithm was established. The minimum zone method was adapted to the Matalb's fmincon function on the basis of least square method. Considering the sphericity error and spherical diameter error as the control...