The charge parameters are crucial factors affecting the damage effect of RC components under close-in explosion.The study of the influence law of different charge parameters on component damage is of guiding significance for improving warhead design and optimizing fire strike scheme.A cylindrical charge with a length to diameter ratio of 5.5 and a charge of 10 kg was used to carry out near explosion damage tests of the supporting column of a reinforced concrete single-storey stacked structure plant at a proportional distance of r=0.2 m kg-1/3,and a comparison test of spherical charge was set up.The experimental results show that the damage effect of a cylindrical charge is stronger than that of a spherical charge,and the reliability of the numerical simulation model is verified by the experimental data.The length to diameter ratio,blast height,charge amount and action distance of cylindrical charge are taken as the research factors,and three levels are determined for each factor.The simulation results of blast damage of reinforced concrete under 9 different charging parameters were designed and obtained by orthogonal simulation test method,and the influence law of cylindrical charging parameters on the damage effect of reinforced concrete columns was analyzed.The amount of the cylindrical charge has the greatest effect on the damage degree,the ratio of length to diameter has the second effect,and the blast height has the least effect on the damage degree.When 4.5≤L/D≤6.5,the damage effect on the component is greater.When the blast height is 1/4,1/2 and 3/4 column height respectively,the explosion at the 1/4 column height has the best damage effect on the support column.