With the rapid development of the economy, the surrounding environment of artillery operation points has changed greatly, in order to further enhance the security of weather modification operations, a set of safety demonstration methods are proposed referring to the characteristics of artillery operation. The method for calculating the external trajectories of artillery for weather modification is derived. On this basis, a more accurate safety assessment method is given in combination with the safety shootingarea method and GIS, and an example is given to demonstrate the feasibility of the represented method. The danger coefficient method for weather modification safety assessment is proposed. The definition of danger coefficient is given, and an example of safety assessment is provided by the safety assessment system developed by the method, which proves the feasibility of the methods.