Catalytic waste gas treatment device

The utility model relates to the field of waste gas treatment, in particular to a catalytic waste gas treatment device which comprises a mounting bottom plate, a catalytic treatment device and a gas inlet pipe, a pretreatment device is arranged on the left side of the mounting bottom plate, the gas inlet pipe is arranged on the left side of the pretreatment device, and a first gas conveying pipe is arranged on the right side of the gas inlet pipe; a filter screen is arranged at the lower end of the drying plate, cleaning liquid is arranged at the lower end of the filter screen, a first gas conveying pipe is arranged on the right side of the pretreatment device, a gas conveying fan is arranged on the first gas conveying pipe, and a catalytic treatment device is arranged on the right side of the first gas conveying pipe in a communicating mode. Water and particles are removed, the follow-up treatment efficiency and effect are improved, and organic matter in waste gas is decomposed into carbon dioxide and water