This patent belongs to fertilizer production equipment, specifically discloses a granular fertilizer mixing arrangement, including storage vat, mixing drum, rotary rod, cam and branch flitch, the storage vat lower extreme is equipped with discharge gate, the inside recess that is equipped with of storage vat, the mixing drum both ends with rotary rod fixed connection, mixing drum are equipped with feed -hopper equipped neck and a plurality of discharge opening inside being located the storage vat on the mixing drum, the rotary rod rotates with the storage cylinder is connected rotary rod and motor output coaxial coupling, cam and the coaxial fixed connection of rotary rod, cam are located mixing drum one side, and the cam is located inside the storage vat, set up in the recess on dividing the flitch, and be located the mixing drum below, be equipped with a plurality of branches material hole on the branch flitch, divide to be equipped with the elastic component between flitch lower extreme and the recess. The problem that the homogeneity is relatively poor, the mixing efficiency is low in order to solve fertilizer formula. Compared with the prior art, this device can get fertilizer formula more evenly, and the mixing efficiency promotes greatly.