Suitable for experimental scenarios with dust and particulate matter; The exhaust outlet of the fume hood bellows is connected to the bottom of the countertop through the bellows, and the cabinet exhaust outlet is set on the countertop. Dust particles with a density greater than that of air will accumulate at the bottom of the cabinet. The cabinet exhaust outlet is set on the countertop, which is more conducive to the discharge of dust particles from the cabinet. A supplementary air outlet is installed at the top of the cabinet, and fresh air is supplied from top to bottom into the cabinet countertop exhaust outlet, which is more conducive to the discharge of dust particles. A front air curtain is installed to effectively prevent dust particles from overflowing from the cabinet.