The minimum smoke shielded area algorithm is designed and the minimum area and space coordinates of the shielded area are given for protecting the targets effectively with the minimum smoke shield. The influence of wind on the exploding point during smoke deployment is analyzed. The adjustment algorithm of deployment angle is proposed. The shielded effect influenced by smoke drifting is researched. Area compensation algorithm is described. The smoke shielded areas and central point coordinates at subarea are obtained finally under current weather conditions.