采用双极性高压介质阻挡放电协同钙钛矿型催化剂对NO_x进行处理，研究了介质阻挡放电协同不同焙烧温度下La_0.7Sr_0.3Ni_0.2Mn_0.5Fe_0.3O₃催化剂及A位不同Ag掺杂量的La_0.7-xAg_xSr_0.3Ni_0.2Mn_0.5Fe_0.3O₃催化剂在不同反应条件下对去除NO_x的影响，并利用XRD、SEM分析各种催化剂性能。结果表明，焙烧温度为650℃的La_0.7Sr_0.3Ni_0.5Mn_0.2Fe_0.3O₃催化剂的效果最佳；A位掺杂Ag对催化剂进行改性，NO转化率和NO_x去除率随着Ag质量分数的增大而降低，两者均在添加量为0.1时达到最大，分别为96.62%和85%。

NO_x is treated by a bipolar high-pressure medium barrier discharge method coordinated with perovskite catalyst.The influences of La_0.7Sr_0.3Ni_0.2Mn_0.5Fe_0.3O₃ calcined at different temperatures and La_0.7-xAg_xSr_0.3Ni_0.2Mn_0.5Fe_0.3O₃ with different amount of A-site Ag dopant amount on the removal of NO_x under different reaction conditions are studied.XRD and SEM are utilized to analyze the properties of various catalysts.It is found that La_0.7Sr_0.3Ni_0.5Mn_0.2Fe_0.3O₃ catalyst prepared at the calcination temperature of 650℃ has the best performance.When the catalyst modified through A-site doped Ag is used,the conversion rate of NO and the removal rate of NO_x both decrease with the increase of Ag addition.Both rates reach the maximum values,96.62% and 85%,respectively when the addition amount of Ag is 0.1.