The utility model discloses a device of biological leaching red mud of batch non -contact, the device includes the fermentation cylinder, fungus liquid knockout drum, coagulating sedimentation jar andleaching jar, with the aspergillus niger spore suspension vaccinate in the culture medium and in the fermentation cylinder acidogenic fermentation, the zymotic fluid that produces gets into fungus liquid knockout drum, further get rid of small mycelium and suspended solid wherein in the leachate entering coagulating sedimentation jar of after -separating, then it carries out the acidolysis and leaches reaction and mud liquid disengaging process to send clear leachate into leaching jar and red mud powder, the supernatant of after -separating is metal ion's extract, the lower part is the red mud residue after the leaching. The utility model discloses a device is when the leaching red mud, and consequently mycelium pellet and red mud granule and contactless can not form the red mud microorganism that is difficult to handle and mix the residue, are favorable to mycelium pellet and the further utilization of red mud residue, adopting and batch leaching the mode, whole biological leaching red mud process has the advantage of green, environmental protection, low cost and scale operation.