Multifunctional exhaust hood

The utility model discloses a multifunctional exhaust hood which comprises exhaust ports. The exhaust ports are connected with an air pipe through flange plates. Adjusting valves are arranged at the connecting positions of the exhaust ports and the flange plates. An annular air screen formed by a plurality of air supply outlets is arranged on the peripheries of the exhaust ports. Flow guide plates are arranged at the bottom of the annular air screen. The flow guide plates are fixedly connected with bottom hole plates. The number of the exhaust ports is four. The four exhaust ports are arranged in a line mode. The number of the air supply outlets is four. The four air supply outlets are arranged in a rectangular mode. The air supply outlets and the exhaust ports are distributed in a staggered mode. According to the multifunctional exhaust hood, the air supply outlets form the annular air screen, the adjusting valves are utilized for controlling the supply and discharge capacity of air volume, on the premise of eliminating hazardous substances, the air supply effect of workshop equipment is achieved, air supplying and exhausting are combined, exhausting of the workshop equipment is achieved, and the requirements of indoor staff for the air volume can be met.