Resistance air volume balancing system

The invention discloses a resistance air volume balancing system which comprises a main flue, a plurality of confluence flues, a plurality of branch flues, a plurality of resistance balancing devices I, a plurality of resistance balancing devices II and a plurality of dust hoods, the output ends of the confluence flues are communicated with the main flue, and the confluence flues are provided with the resistance balancing devices II. A plurality of branch flues communicated with the converging flues are arranged on the converging flues in front of the resistance balancing devices II, resistance balancing devices I are arranged on the branch flues, dust hoods are arranged at the input ends of the branch flues, and each resistance balancing device I comprises a pipe body, a fixed sealing plate, a through hole, an adjusting sealing plate and a positioning mechanism. Compared with the prior art, online adjustment can be achieved, the problem that dynamic large air volume cannot be effectively adjusted is solved,