Fuming cupboard

The utility model relates to the technical field of ventilation kitchens, in particular to a ventilation cupboard, and provides a ventilation cupboard which can reduce the possibility of polluting prepared samples when acid liquor is condensed and drips back and reduce the possibility of corroding instruments in the ventilation kitchens, so that the practicability is enhanced. Comprising a workbench and a ventilation assembly, the ventilation assembly is used for sucking acid mist and comprises a first supporting plate, a first ventilation pipe, a second ventilation pipe, an air pump and a third ventilation pipe, the air pump is fixedly installed on the workbench through the first supporting plate, the first ventilation pipe is communicated with the second ventilation pipe, and the second ventilation pipe is connected with the input end of the air pump; the third ventilation pipe is connected with the output end of the air pump, the collecting assembly is used for collecting back-dripping acid liquor and comp