Centrifugal fan with noise reduction function

The utility model belongs to the technical field of centrifugal fans. The utility model relates to a fan, in particular to a centrifugal fan with a noise-reducing function. Including a housing, a buffer mechanism is arranged at the bottom of the shell; a fixed lantern ring is arranged in the shell; impellers distributed in an array mode are fixed to the outer ring of the fixing lantern ring. The inner ring of the fixed lantern ring is movably sleeved with a fixed shaft; an air inlet pipe fixedly sleeved with the shell is fixed at one end, extending out of the shell, of the fixed shaft; the width of the air inlet pipe is gradually increased in the direction from the impeller to the air inlet pipe; a plurality of groups of noise reduction mechanisms are fixed on the outer ring of the fixed shaft; the noise reduction mechanism is located in the air inlet pipe. The noise reduction mechanism comprises a noise reduction plate fixed to the outer ring of the fixing shaft, a through hole is formed in the noise reducti