An improved rotary drum washer for ginger and turmeric which comprises of perforated rotary drum (1) being fixed on the top of a water sump(12) with the help of a stand, characterized in that the said rotary drum(l) having roller (2), the said rotary drum(l) being supported by two sets of rollers and also help the drum to rotate, the said drum being kept inclined to the horizontal and its angle can be adjusted for changing the residence time of the material inside the drum, a girth gear (3) being attached to the said drum(l) which is driven by the pinion of a high starting-torque motor (4), the said torque motor (4) being attached engaged with the said girth gear (3) , a hopper (5) and vibro feeder (6) being provided at the feeding end of the said drum(l), plurality of nozzles (9) being provided at upper inside of the said rotary drum (1), the said nozzles(9) being connected to main reservoir (10) through a pump (11), the said reservoir being connected to water sump(12) through a mud filter (13), plurality of flights (7) being attached inside the drum and gradually moves down towards the lower end , an angle adjustment screw (14) being provided at feeding side in the said stand supporting the said rotory drum (1), a drain valve (15) being provided to the said water sump(12), a discharge chute (8) being attached at the discharge end for collection of washed  ginger / turmeric .