Variable ventilation cabinet

The utility model discloses a variable ventilation cabinet, and belongs to the related technical field of laboratory home furnishing. The utility model relates to a multifunctional cabinet which comprises side plates, a functional panel, a front baffle plate, a rear baffle plate, a top plate, an exhaust interface, a pressure relief opening, a top lamp, an inclined back plate, a first rear back plate, a second rear back plate, a third rear back plate, a fourth rear back plate, a fixed window, a first push-pull window, a second push-pull window, a countertop, a first bottom cabinet, a second bottom cabinet and a third bottom cabinet, the fume cupboard can be flexibly converted into different fume cupboard types according to use requirements, two or three types of fume cupboards can be converted among a table type fume cupboard, a short table type fume cupboard and a floor type fume cupboard, more experiment contents can be completed, various types of fume cupboards do not need to be additionally arranged, more