The invention discloses a mechanical coin classifier.The mechanical coin classifier comprises a machine frame, wherein side covers are arranged around the machine frame, and an upper machine cover is arranged above the machine frame.The mechanical coin classifier is characterized in that a coin inlet fixing cylinder is arranged on the upper machine cover, a power unit, a transmission unit and a classification unit are arranged on the machine frame, the classification unit comprises a separating turnplate and a separating slideway, the lower wall of the separating slideway inclines, a rotary shaft is arranged under the separating turnplate and connected with the power unit through the transmission unit, the separating slideway is provided with a coin inlet which is matched with a coin outlet in a supporting disc, and a ten-cent collecting device, a fifty-cent collecting device and a one-yuan collecting device are sequentially arranged on the separating slideway.By the adoption of the mechanical coin classifier, coins can be classified effectively and accurately so that labor can be saved, labor time can be reduced and labor efficiency can be improved.