The main stadium canopy of Zhejiang Huanglong Sports Center adopts diagonal net shell structure, its structural system consists of tower, inner and outer ring beam, diagonal cable, net shell, stabilizing cables, etc. When designing the canopy, it is combined with the substructure to carry out the overall stress analysis. When designing, under the premise of meeting the requirements of structural stress performance, the arrangement of structural components is determined, taking into account the convenience of construction. The prestressing control force of the inclined cable and stabilizing cable is calculated according to the actual progress sequence of the site, and good results have been achieved.