A kind of skimming device of slow grinding machine, the pushing off the slag unit comprising a bearing seat and an installation what bearing seat. Bearing seat have between the upper and lower every one of bottom space and a grinding space, and the scum hole with connection grinding a space and bottom space, residue outlet and juice yield tube be to be respectively communicated with what bottom space and grind space. Pushing off the slag unit include one with bearing seat cooperation define one be connected to scum hole and residue outlet lead slag channel lead slag lid, and an installation what leads the pushing off the slag part of slag lid, pushing off the slag part be can by slag charge elasticity squeezes and covers block resistance what with pushing away opening and lead between slag channel and scum hole down. It through the combined structure design of bearing seat and pushing off the slag unit, can be greatly reduced outside the juice amount via scum hole outflow, and effectively improve scum juice separating effect, the component of bearing seat and pushing off the slag unit is also made to be easier to what cleaning.一種慢磨機之擋渣裝置，包含一承載座，及一安裝於承載座之擋渣單元。承載座具有上下間隔之一底部空間與一研磨空間，並具有一連通研磨空間與底部空間的出渣孔，其出渣管與出汁管是分別連通於底部空間和研磨空間。擋渣單元包括一個與承載座配合界定出一個連通出渣孔與出渣管的導渣通道的導渣蓋，及一個安裝於導渣蓋之擋渣件，擋渣件是可被渣料往下彈性擠推打開地遮蔽擋阻於導渣通道與出渣孔間。透過承載座與擋渣單元之組合結構設計，可大幅降低經由出渣孔流出的汁液量外，而有效提高渣汁分離效果，還使承載座與擋渣單元之構件更易於清潔。
